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  • Ronan Kelly
    started a topic Institute for Disease Control weekly reports winter 2012-2013

    Institute for Disease Control weekly reports winter 2012-2013

    Last season's thread - http://www.flutrackers.com/forum/sho...d.php?t=180970

    Influenza Report, Week 40 (1/10 - 7/10), 2012
    Report on the current flu situation

    Influenza in Sweden
    Influenza activity is still low in Sweden for 40 weeks reported Västra Götaland a case of seasonal influenza A (H3N2) who were traveling abroad and only a few cases of patients with influenza-like illness reported by sentinel surveillance from across the country. By sentinel sampling has 5 samples received but none contained the virus.

    During the summer, sporadic cases of influenza reported from laboratories in Stockholm, Scania, Västra Götaland, and Örebro. The cases reported during the summer weeks are probably people who become infected during travel abroad. During week 37, two cases of influenza B from Stockholm and Västra Götaland and one case of influenza A (H1N1) pdm09 from Stockholm. During week 39 reported a case of seasonal influenza A (H3N2) from Västra Götaland.
    ...
    http://www.smittskyddsinstitutet.se/...vecka-40-2012/

  • Ronan Kelly
    replied
    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 15 (8/4 - 14/4), 2013
    Report on the current flu situation

    Influenza in Sweden
    For week 15 reported 245 laboratory confirmed influenza cases ( Table 1 ). The number of cases and the number of samples analyzed for influenza has declined steadily since week 7, when both had their peak. More than 100 cases of influenza have been reported per week seventeen weeks in a row, which is an unusually long period ( Figure 1 ).

    Influenza B now dominate completely. The decline is slow and the number of cases of this type are still high compared to previous seasons ( Figure 3 - influenza B ). It also makes the flu season unusually long.

    Sentinel sampling reflects the clinical sample: the number of submitted samples decreases and influenza B predominates. During week 15 were sampled 24 individuals of which had seasonal flu A/H3 and 6 influenza B ( Figure 5 ).

    Since the previous weekly report is an influenza A (H1N1) pdm09-cases became ill in February reported as deceased. The woman was 77 years old and had more underlying risk factors for severe disease. The total number of reported A (H1N1) pdm09 cases who died is now 19. No new flu cases have been reported from the Swedish Intensive Care Registry.

    Sentinel reporting, Web Search and the number of calls to 1177, all of which reflect influenza activity, also decreases (see syndromic surveillance ).

    Although the flu has fallen sharply since the peak week seven, we have unusually high activity for being so late in the season. Hopefully the spring weather to have a braking effect on the spread, but still, one can suffer from influenza B.
    ...
    http://www.smittskyddsinstitutet.se/...vecka-15-2013/

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  • Ronan Kelly
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    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 14 (1/4 - 7/4), 2013
    Report on the current flu situation
    Editors: Hélène Englund, Anna Sara Carnahan

    Influenza in Sweden
    For week 14, a total of 274 laboratory-confirmed cases of influenza, which is a decrease compared to the 336 cases reported by week 13 ( Table 1 ). It is still an unusually high figure this time of year ( Figure 1 ), even compared to last year when we had many cases exceptionally late. Influenza A (H1N1) pdm09 and seasonal influenza A continued as before week to decrease, and this week also reduced the number of influenza B cases ( Table 1 ). About a quarter of the samples analyzed were positive for influenza virus.

    Still detected virus in all parts of the country, but the slowdown is evident in all counties ( Table 2 , map ).

    No new deaths have been reported through SmiNet. From Swedish Intensive Care Registry has five more intensive caring influenza cases reported: two A (H1N1) pdm09-cases fell ill in late February / early March, and an A-cases and two B cases diagnosed in recent weeks. The patients with A (H1N1) pdm09 were both babies were born in 2013, A case was a 85-year-old woman. The two B cases were men in their fifties, reflecting how the virus affects different age groups ( Table 3 ).

    From sentinel surveillance reported fewer patients with influenza-like illness and among the samples taken at week 14 was only 16% positive ( figures and tables ).

    Web search shows that fewer people searching for flu symptoms Vårdguiden.se, but the decline is unusually slow. Fewer people are calling even to 1177 with questions about fever in children - the clearest indicator of flu in this system ( Contact Causes 1177 ). Cough and sore throat in adults of all ages is increasing, however, which may indicate that other viruses are in circulation.

    Although flu season is protracted talks surveillance to the now coming to an end.
    ...

    Influenza type // Current week 13/2013 // Previous Week 12/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 30 // 31 // -3% // 2,402
    Seasonal Influenza A // 68 // 93 // -27% // 2,739
    Seasonal influenza B // 176 // 212 // -17% // 2,382
    Total cases // 274 // 336 // -18% // 7,523
    Number of samples analyzed // 996 // 1,128 // - // 27,543
    Percentage of positive samples // 27.5% // 29.8% // - // 27.3%
    ...
    http://www.smittskyddsinstitutet.se/...vecka-14-2013/

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  • Ronan Kelly
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    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 13 (25/3 - 31/3), 2013
    Report on the current flu situation
    Editors: Hélène Englund, Anna Sara Carnahan

    Influenza in Sweden
    For week 13, a total of 349 influenza cases from the country's laboratories, which is a decrease of 15% compared to week 12. Dårapporterades 412 cases. The percentage of positive samples is still high ( Table 1 , Table 2 ).

    Influenza B now represent the majority of laboratory-confirmed cases ( Figure 3 ). Only 32 cases of influenza A (H1N1) pdm09 ("swine flu") was reported, which is half compared to last week. No cases have been reported from Gavlebourg, SWE or Västernorrland recent weeks ( Table 3 ). Seasonal Influenza A decreases too, but somewhat slower than the A (H1N1) pdm09.

    No new deaths from A (H1N1) pdm09 have been reported, but two new intensive cared for flu patients, one with influenza B and one with seasonal influenza A. Both are over 65 and have underlying diseases.

    The number of people with flu-like illness visits outpatient decreasing, but at a slow rate ( Figure 4 ). Although the number of samples taken in the sentinel sampling decreases, but is still a relatively high proportion, 31%, positive for influenza, the majority of influenza B ( Figure 5 ). During the season, mainly influenza B Yamagata-line, part of the seasonal flu vaccine demonstrated, but in recent weeks has also influenza B Victoria Line diagnosed.

    The number of calls to 1177 with questions about flu symptoms increased slightly in week 13 ( contact causes in 1177 ), but since the total number of calls also increased the proportion of calls that indicates the flu constantly. Although Web Search declined at week 13.

    Everything is talking to flu season is about to slow down, even if the decline is unusually slow, perhaps due to the cold.
    ...
    Influenza type // Current week 13/2013 // Previous Week 12/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 31 // 65 // -52% // 2,372
    Seasonal Influenza A // 90 // 119 // -24% // 2,664
    Seasonal influenza B // 228 // 228 // 0% // 2,222
    Total cases // 349 // 412 // -15% // 7,258
    Number of samples analyzed // 1,116 // 1,295 // - // 26,524
    Percentage of positive samples // 31.3% // 31.8% // - // 27.4%
    ...
    http://www.smittskyddsinstitutet.se/...vecka-13-2013/

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  • Ronan Kelly
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    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 12 (18/3 - 24/3), 2013
    Report on the current flu situation
    Editors: Hélène Englund, Anna Sara Carnahan

    Influenza in Sweden
    Influenza spread further decreased slowly during 12 weeks, and especially influenza B still circulating. Total reported 387 laboratory confirmed cases of influenza, a decrease of 16% compared to week 11 ( Table 1 , Table 2 ). 53 percent of the reported cases were influenza B. Most cases per capita reported from Västra Götaland (see map ).

    A middle-aged man was reported dead with A (H1N1) pdm09 during week 12. In total during the season, we have learned of 18 people died and 115 people have been notified intensive nursed because of A (H1N1) pdm09. From ICU has seven patients infected with seasonal influenza A/H3N2, 25 with an unspecified influenza A infection and 16 influenza B cases reported by Swedish Intensive Care Registry .

    The proportion of people who applied sentinel physicians for influenza-like illness was during week 12 at a low level ( Fig. 4 , Table 4 ). The number of sentinel samples were halved compared to week 11, but the percentage positive for influenza, 42%, remains at a relatively high level ( Figure 5 , Table 5 ). Although other monitoring speak too slowly declining influenza activity ( Web Search , Contact Causes 1177 ).

    Respiratory infection were acts - like winter weather - linger.
    ...
    Influenza type // Current week 12/2013 // Previous Week 11/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 65 // 70 // -7% // 2,341
    Seasonal Influenza A // 116 // 137 // -15% // 2,571
    Seasonal influenza B // 206 // 254 // -19% // 1,972
    Total cases // 387 // 461 // -16% // 6,884
    Number of samples analyzed // 1,295 // 1,500 // - // 25,408
    Percentage of positive samples // 29.9% // 30.7% // - // 27.1%
    ...
    http://www.smittskyddsinstitutet.se/...vecka-12-2013/

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  • Ronan Kelly
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    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 11 (11/3 - 17/3), 2013
    Report on the current flu situation
    Editors: Hélène Englund, Anna Sara Carnahan

    Influenza in Sweden
    For week 11, 433 reported cases of influenza, compared with 501 cases reported overall in week 10 ( Table 1 , Table 2 ). More than half of these were influenza B ( Figure 3 ). Influenza activity continues to decline throughout the country (see map ), but the incidence of influenza B helps to make the flu season lengthy.

    The incidence of seasonal influenza A is normally highest among persons over 65 years, while the influenza A (H1N1) pdm09 mainly affects the young children under five. Influenza B is present in almost all age groups, but children between 5 and 14 years are slightly overrepresented among cases ( Table 3 ).

    Of a total of 2472 reported, laboratory-confirmed cases of A (H1N1) pdm09 season has 962 hospitalized (39&#37. Since the previous weekly report has a death of a person with severe underlying disease reported by SmiNet. A total of 17 deaths reported during the season.

    Through the Swedish Intensive Care Registry has this season a hundred intensive nursed patients with influenza reported. More than half have had influenza A (H1N1) pdm09, but almost a third have been infected with influenza A (not H1N1) and 15% of patients had influenza B. Half of the intense nursed cases over 59 years, but the average age is slightly different ate between influenza types: Influenza A (not H1N1) was 65 years, while it was 51 years for A (H1N1) pdm09 and 47 years for influenza B.

    The reports from sentinel physicians in outpatient care shows that the proportion of patients with influenza-like illness (ILI) has remained at medium level in the last three weeks ( Figure 4 , Table 4 ). Of the 64 sentinel specimens collected in sentinel surveillance week 11, almost half (48%) were positive for influenza. This is the highest percentage of positive samples for the season and an increase compared to week 10 when 39% were positive for influenza ( Figure 5 , Table 5 ). Nearly 75% of the positive samples from week 11 were influenza B and the majority (91%) were similar to the vaccine strain (B-Yamagata-like). Of the influenza A positive samples subtypats were all A (H3N2), no influenza A (H1N1) pdm09 was diagnosed.

    A similar picture of moderate but slowing activity also shows Web Search and the number of calls to Sjukvårdsrådgivningen 1177 with questions about the flu-like symptoms ( Contact Causes 1177 ).

    After a long and unusually severe influenza A season points are that we approach the end of this. Influenza B tends however to circulate for a longer period and monitoring systems show that this activity is still high. We can therefore expect more cases of influenza in the coming weeks, but it is unusual for influenza B causes severe illness.
    ...
    Influenza type // Current week 11/2013 // Previous Week 10/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 69 // 102 // -32% // 2,275
    Seasonal Influenza A // 126 // 169 // -25% // 2,460
    Seasonal influenza B // 238 // 230 // +3% // 1,751
    Total cases // 433 // 501 // -14% // 6,486
    Number of samples analyzed // 1,500 // 1,729 // - // 24,113
    Percentage of positive samples // 28.9% // 29.0% // - // 26.9%
    ...
    http://www.smittskyddsinstitutet.se/...vecka-11-2013/

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  • Ronan Kelly
    replied
    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 10 (4/3 - 10/3), 2013
    Report on the current flu situation
    Editors: Hélène Englund, Anna Sara Carnahan

    ts / Flu Reports / Season 2012/2013 / Flu Report, Week 10 (4/3 - 10/3), 2013
    Influenza Report, Week 10 (4/3 - 10/3), 2013
    Report on the current flu situation

    Influenza in Sweden
    In weeks 10 454 reported cases of influenza, compared with 626 cases week 9 ( Table 1 ). During week 10 were influenza B almost half of all laboratory confirmed cases, but continued to circulate even A (H1N1) pdm09 and seasonal influenza A. The number of cases seems to have fallen for all flu types in week 10 ( Table 1 ), but we do not have reports of a few laboratories. The incidence of laboratory-confirmed influenza cases, in terms of population, is highest in Halland Jämtland, Värmland and Örebro County (see map ).

    Of a total of 2396 reported, laboratory-confirmed cases of A (H1N1) pdm09 through week 10, 902 hospitalized (38&#37. Of these, 106 (12%) intensive cared. Among the intensive cared, about 60% stated to belong to a risk group, while the corresponding proportion among other hospitalized is approximately 50%. Almost half of the intensive caring is between 40 and 64 years and about a quarter are over 65. Since the previous weekly report, four more persons with laboratory-confirmed A (H1N1) infection pdm09 reported to have died. A total of 16 deaths have been reported in SmiNet and almost all belonged to a risk group for severe disease.

    From outpatient reported still very flu-like illness (ILI), although the trend has been downward since week 6 ( Figure 4 ). SMI analyzed 54 sentinel samples from week 10, of which 33% were positive for influenza; half for influenza A and half for influenza B ( Figure 5 ). All influenza B strains were similar to the vaccine strain (B-Yamagata-like). Both the number of submitted samples and the proportion of positive samples decreased from week 9 when the 119 samples submitted for analysis, and 44% were positive for influenza.

    Web Search and telephone inquiries to 1177 give similar pictures of a slowly declining influenza activity ( Contact Causes 1177 ).
    ...
    Influenza type // Current week 10/2013 // Previous Week 9/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 102 // 159 // -36% // 2,206
    Seasonal Influenza A // 145 // 223 // -35% // 2,310
    Seasonal influenza B // 207 // 244 // -15% // 1,490
    Total cases // 454 // 626 // -27% // 6,006
    Number of samples analyzed // 1,676 // 1,961 // - // 22,560
    Percentage of positive samples // 27.1% // 31.9% // - // 26.6%
    ...
    http://www.smittskyddsinstitutet.se/...vecka-10-2013/

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  • Ronan Kelly
    replied
    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 9 (25/2 - 3/3), 2013
    Report on the current flu situation
    Editors: Hélène Englund, Anna Sara Carnahan

    Influenza in Sweden
    During week 9, a total of 782 laboratory-confirmed cases of influenza, a decrease of 20% compared with week 8 ( Table 1 ). The cases were fairly evenly divided between seasonal influenza strains A and B and A (H1N1) pdm09, but seasonal influenza B decreased only marginally. Halland Jämtland Örebro and Kronoberg reported slightly more cases than 8 weeks but in all other counties reduced influence cases ( map ).

    Of the total 2289 cases of A (H1N1) pdm09 reported during the season, 835 hospitalized (36%). Of these, 91 (11%) received treatment intensive, seven of which have required ECMO treatment. About 60% of the intensive caring is set to belong to any risk group. In total, during the season 12 deaths reported through SmiNet and no new deaths have been reported in week 9. If an already notified the patient's death, this is not notifiable and from previous seasons, we know that we may continuously aware of all deaths. When the season is over, it is a complementary analysis and the number of deaths associated with A (H1N1) pdm09 may then rise.

    Despite the decline in the number of cases, influenza activity remains high, and it is also seen in both sentinel reporting ( Figure 4 ) as sentinel sampling ( Figure 5 ). In sentinel sampling, the proportion of influenza B positive samples increased. Sentinel reporting mainly reflect cases that sought outpatient, while laboratory reporting ( Table 2 ) reflects the seeking inpatient and emergency rooms. Relatively few influenza B patients usually need medical care. The increase of B-positive samples in the sentinel sampling therefore indicates that the spread of this influenza type has increased in society in week 9. This may also be the cause of the decline of influenza increases Vårdguiden ( Web Search ) and telephone inquiries about the fever and cough leveled off during the week ( Contact Causes 1177 ).

    In summary, influenza activity remained high during the week 9, but still declining. All three types of flu still circulating, and probably increased the number of cases of influenza B in the community.
    ...
    Influenza type // Current week 9/2013 // Previous Week 8/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 159 // 229 // -31% // 2,104
    Seasonal Influenza A // 230 // 293 // -22% // 2,172
    Seasonal influenza B // 239 // 260 // -8% // 1,278
    Total cases // 628 // 782 // -20% // 5,554
    Number of samples analyzed // 1,907 // 2,169 // - // 20,830
    Percentage of positive samples // 32.9% // 36.1% // - // 26.7%
    ...
    http://www.smittskyddsinstitutet.se/...-vecka-9-2013/

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  • Ronan Kelly
    replied
    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 8 (18/2 - 24/2), 2013
    Report on the current flu situation
    Editor: Hélène Englund

    Influenza in Sweden
    In week 8, the number of laboratory confirmed cases of influenza A (H1N1) pdm09 and seasonal influenza A (H3) to decrease, while influenza B increased ( Table 1 , Figure 3 ). In total 734 cases of influenza were reported at week 8 compared with 855 cases week 7. The decrease seen in all parts of the country (see map ). Although the three flu variants were detected in the same proportions at the national level, where the different classes in different regions. For example, in Stockholm and Uppsala detected more cases of influenza B than A ( Table 2 ). Age distribution of cases was earlier in the season (see Influenza Report Week 7 ).

    Up until week 8, 746 people hospitalized for the A (H1N1) pdm09 and of these, 75 required intensive care. No new cases nursed in ECMO has been reported. 65% of intensive caring and ECMO patients and 51% of other hospitalized belonged to a risk group for severe disease. No new deaths related to influenza A (H1N1) pdm09 infection have been reported. Through the Swedish Intensive Care Registry has 29 intensive nursed patients who fell ill weeks 5 or later reported: of these, one third had influenza B, half the influenza A (H1N1) pdm09 and the remaining other influenza A infections.

    Sentinel physicians reported in week 8, a slightly higher percentage of patient visits with influenza-like illness (ILI) , compared with the previous week, but the increase is probably due to a low number of reporters ( Fig. 4 , Table 4 ). For the third week in a row, we see a decrease in the proportion of positive samples collected in sentinel surveillance. From the positive samples was 65% influenza A and 35% influenza B ( Figure 5 , Table 5 ). Subtype A (H1N1) pdm09 constituted 58% of the influenza A-positive samples. Among samples positive for influenza B belonged to 88% B / Yamagatalinjen, part of the seasonal flu vaccine.

    The reports of syndromic surveillance systems Web Search , Sickness Report and Flu income , and the number of calls to 1177 (see Contact Causes 1177 ) speaks as well as other reporting declining influenza activity during week 8.

    It is above all the flus that usually causes serious illness, A (H1N1) pdm09 and seasonal influenza A, which decreases. Influenza B can remain relatively high level of a few weeks. Although it can cause severe pneumonia in young adults, but it is much rarer than the A (H1N1) pdm09. Often affected older toddlers and school children from relatively mild influenza B infection that requires medical care.
    ...
    Influenza type // Current week 8/2013 // Previous Week 7/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 229 // 327 // -30% // 1,945
    Seasonal Influenza A // 257 // 308 // -17% // 1,887
    Seasonal influenza B // 248 // 220 // 13% // 1,023
    Total cases // 734 // 855 // -14% // 4,855
    Number of samples analyzed // 2,151 // 2,360 // - // 18,888
    Percentage of positive samples // 34.1% // 34.1% // - // 25.7%
    ...
    http://www.smittskyddsinstitutet.se/...-vecka-8-2013/

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  • Ronan Kelly
    replied
    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 7 (11/2 - 17/2), 2013

    Editor: Hélène Englund

    Influenza in Sweden
    During week 7, a total of 819 laboratory-confirmed cases of influenza, which is slightly less compared to last week, when 838 cases were reported ( Table 1 ). The decrease was primarily due to influenza A (H1N1) pdm09 and seasonal influenza A (H3), while influenza B, however increased substantially ( Figure - Influenza types ).

    For the entire season, it is mainly children, born after 2009 pandemic, and adults aged 15-64 who have been affected most by the A (H1N1) pdm09, while influenza A (H3) mainly struck against people over 65. Influenza B has mainly been observed in children and adolescents aged 5 to 14 years. The reports from the last two weeks (weeks 6 and 7) shows a similar picture, with the difference that the influenza A (H3) detected more frequently in children and influenza B in the elderly.

    Up until week 7, 637 people reported to have been hospitalized for the A (H1N1) pdm09 and of these, 66 required intensive care and six have been treated with ECMO. Among the 33% of the intensive nursed is no indication that patients belonging to a risk group. Among other intensive nursed was chronic lung disease, and immunocompromised most common underlying diseases. Total now has twelve deaths in close proximity to one influenza A (H1N1) infection pdm09 reported. From Swedish Intensive Care Registry , SMI received reports of 64 intensive nursed patients. This shows more than half of patients have an infection with influenza A (H1N1) pdm09, but also cases with influenza A/H3 and B treated in ICU. Moreover, one can note that the average age of those who cared for in the ICU is not more than 54 years.

    The number of laboratory confirmed cases have been high in large parts of Sweden in the last week (see map ), but differences in sampling likely play a major role in the proportion of all cases diagnosed. For example, the number of diagnosed cases in week 7, in terms of population, the highest in Värmland, Dalarna, Kalmar and West Bengal. In Värmland, however, was only a quarter of the samples were positive, compared with half of the samples analyzed at the Sahlgrenska University Hospital in West Bengal, suggesting that in Värmland was more generous with sampling and probably diagnosed a larger proportion of all cases. This means that the figures are not strictly comparable between different counties.

    Sentinel physicians reported during week 7 a lower percentage of patient visits with influenza-like illness (ILI), compared with the peak week 6 ( Fig. 4 , Table 4 ). The proportion of positive samples collected in sentinel surveillance decreased from 43% week 6 37% week 7 ( Figure 5 ). A total of 151 samples analyzed SMI and of these 23 (15%) were positive for A (H1N1) pdm09, 14 (9%) for influenza A (H3) and 17 samples (11%) for influenza B ( Table 5 ). The majority of influenza B samples this season have been of the line type B-Yamagata, which is included in the seasonal vaccine, but the last two weeks have been also cases of B-Victoria diagnosed.

    Also this week suggest the reports from Web Search and 1177 that influenza activity begins to slow down.

    The decreasing number of cases of influenza A (both A/H1N1pdm09 and A/H3) together with indications from other surveillance systems indicate that the peak for these viruses, which mainly causes disease in children and the elderly, can be reached. Growth of influenza B can lead to the influenza season as a whole can have a longer sequence than would otherwise be expected in case of influenza A begins to decrease. A similar development has among other things been seen in Denmark (see Influenza in the world ).
    ...
    Influenza type // Current week 7/2013 // Previous Week 6/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 325 // 362 // -10% // 1,714
    Seasonal Influenza A // 288 // 315 // -9% // 1,619
    Seasonal influenza B // 206 // 161 // 28% // 763
    Total cases // 819 // 838 // -2% // 4,096
    Number of samples analyzed // 2,360 // 2,212 // - // 16,737
    Percentage of positive samples // 34.7% // 37.9% // - // 24.5%
    ...
    http://www.smittskyddsinstitutet.se/...-vecka-7-2013/

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  • Ronan Kelly
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    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 6 (4/2 - 10/2), 2013

    Editor: Hélène Englund

    Contents
    Influenza in Sweden
    During week 6, a total of 717 laboratory-confirmed cases of influenza, an increase of over 10%, compared with the previous week ( Table 1 ). This is a smaller increase than the previous week when the increase was approximately 45%. Influenza A (H1N1) pdm09 accounted for half of all cases, and accounted for almost the entire increase in the week, seasonal influenza A accounted for over a third and 17% were influenza B.

    Number of influenza cases per laboratory .

    Number of influenza A (H1N1) pdm09 cases per county .

    Based on the reported cases, it is mainly children who were born after 2009 pandemic and adults who have been most affected by the A (H1N1) pdm09. The elderly are as usual the most needed health care for seasonal influenza A. Influenza B has mainly been observed in children and adolescents.

    480 people have been hospitalized for the A (H1N1) pdm09 and of these 47, according to the reports we have received required intensive care and 6 have been treated with ECMO. Among the 32% of intensive caring is no indication of belonging to a risk group. A degree of underreporting may occur. A new death of a person who belonged to division has been reported. Total now has seven deaths reported. From Swedish Intensive Care Registry, SMI received reports of a total of 49 intensive nursed patients, of whom 28 had influenza A (H1N1) pdm09, three influenza A/H3 and four influenza B. Other patients had influenza A without specified subtype.

    All three viruses are found throughout the country. Incidence The map indicates that eastern Sweden now suffered most during week 6, but since it takes different amounts of samples in different counties are assessing the spread severe (see map ). Värmland has again reported the highest number of cases per capita, but there are also a lot of samples.

    The relatively high influenza activity is also visible in the sentinel reports from outpatient there now 0.04% of the patient population have sought care for influenza-like illness (ILI). It may seem little, but is a relatively high figure. SMI has analyzed 168 samples taken in the sentinel surveillance Week 6. Also this week is about 40% of the samples were positive for influenza. Of the positive samples was 41% influenza A (H1N1) pdm09, 23% were influenza A/H3 and 26% influenza B / Yamagata-like.

    Reports from 1177 and Web Search speaks both to influenza activity now leveled off, but is at a relatively high level.

    Altogether, weekly reporting to the flu peak may have been reached, but that the high activity may persist for one or two weeks. In combination with the many RS cases , even the coming weeks be exhausting for care and general and especially for parents of young children.

    Figure 1 . Number of cases of laboratorieverierad influenza (all subtypes) per week and season.
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    ...
    Table 1 . Number of laboratory confirmed influenza cases, current week and cumulatively since week 40/2012, broken down by influenza A (H1N1) pdm09 and seasonal influenza A and B, and the number of samples analyzed and the percentage positive.

    Influenza type // Current week 6/2013 // Previous Week 5/2013 // Change // Cumulatively during the season

    A (H1N1) pdm09 // 361 // 284 // 27% // 1388
    Seasonal Influenza A // 236 // 256 // -8% // 1238
    Seasonal influenza B // 120 // 119 // 1% // 514
    Total cases // 717 // 659 // 9% // 3140
    Number of samples analyzed // 2109 // 1888 // - // 14232
    Percentage of positive samples // 34.0% // 34.9% // - // 22.1%
    ...

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  • Ronan Kelly
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    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 5 (28/1 - 3/2), 2013
    Report on the current flu situation

    Editor: Hélène Englund

    Contents
    Influenza in Sweden
    During week 5 reported 625 cases of laboratory confirmed influenza from its laboratories. There is an increase of 173 cases compared with week 4. Of these, 284 cases were influenza A (H1N1) pdm09, 232 seasonal influenza A and 109 influenza B cases ( Figure 1 , Table 1 and Table 2 ). All types increased compared with week 4, but the largest increase, 65% were influenza B ( Figure 3 ).

    The reports of influenza-like illness from outpatient care continued to increase during week 5 (see sentinel ), as well as the number of calls to the 1177 health care advice and the number of searches on Vårdguiden on flu and flu symptoms increased ( Contact Causes 1177 , Web Search ). These systems thus shows what has been reported in health care and in the media - that many people are now sick.

    During week 5 diagnosed Infectious Disease influenza virus in 39% of the samples taken in the outpatient setting under sentinel surveillance (see sentinel ). This represents a decrease from 44% positive samples week 4. From the positive samples was 45% influenza A (H1N1) pdm09, 34% influenza A (H3) and 21% influenza B, a distribution similar to that in the clinical laboratory reporting.

    Generally diagnosed influenza A (H1N1) pdm09 still mainly in children under five years of age and in adults between 15 and 39 years. Seasonal influenza A (H3N2) mainly affects people over 65 years and can thus lead to more serious illness.

    Among those who have been diagnosed with influenza A (H1N1) pdm09 season has been 335 reported hospitalized, 35 people have required intensive care. Most of the intensive nursed, 25 pieces, has been reported to have one or more risk factors for severe disease, such as chronic lung disease or weakened immune system. Six people have been reported as deceased. Of these belonged to five people at risk of which four had severe underlying diseases.

    In summary indicates all the monitoring that we can expect a continued high level of influenza activity in the coming weeks. Because right now we have three types of influenza circulating at the same time, it is difficult to predict when the activity may diminish.

    To protect yourself and others from infection is particularly important in the next few weeks, as well as to contact care if you become ill with influenza, and belongs to the group at risk of serious illness, or become seriously ill.

    Read more

    Nurse's website
    National Board website (Which should be offered treatment with antivirals and what may be a sign of serious illness)
    Figure 1 . Number of cases of laboratorieverierad influenza (all subtypes) per week and season.
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    Table 1 . Number of laboratory confirmed influenza cases, current week and cumulatively since week 40/2012, broken down by influenza A (H1N1) pdm09 and seasonal influenza A and B, and the number of samples analyzed and the percentage positive.
    Influenza type / Current Week / Cumulatively
    A (H1N1) pdm09 / 284 / 1,027
    Seasonal Influenza A / 232 / 989
    Seasonal influenza B / 109 / 380
    Total cases / 625 / 2,396
    Number of samples analyzed / 1,844 / 12,079
    Percentage of positive samples / 33.9% / 19.8%
    ...

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  • Ronan Kelly
    replied
    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 4 (21/1 -27 / 1), 2013
    Report on the current flu situation

    Editor: Hélène Englund

    Influenza in Sweden
    The number of laboratory reported flu cases in the country increased from a total of 361 cases, weeks 3-445 case, week 4 ( Figure 1 , Table 1 ). The activity is now at a relatively high level, but the increase is not as sharp as when flu peaked in February 2012. Of the reported cases was 222 A (H1N1) pdm09 ("swine flu"), 159 cases seasonal influenza A and 64 cases influenza B. This means that the number of diagnoses increased for all types compared to week 3, but A (H1N1) pdm09 increased the most, 180 to 222 cases.

    Influenza A (H1N1) pdm09 has been mainly reported in children between 0 and 4 years and adults between 15 and 39 years, while laboratory confirmed seasonal influenza A has been most common in people over 65. Influenza in the country, but the number of new cases per 100 000 inhabitants was still highest in Värmland and Dalarna in week 4 ( map , table of H1N1 cases per county ).

    Of a total of 803 cases of influenza A (H1N1) pdm09 notified by laboratories and sentinel samplers during the season with 189 hospitalized, 16 required intensive care and four treated for ECMO. Three children under five have required intensive care, but the majority has been between 40 and 64 år.Av those requiring intensive care was 70% belonged to the risk group for severe disease. So far, three people reported dead with A (H1N1) pdm09, two of which belonged to the risk group.

    The sentinel reporting increased number of doctor visits for influenza-like illness from 11 to 14 per 100 000 population. The percentage of positive samples in the sentinel sampling increased from 30% to 40% compared with week 3, the proportion of A (H1N1) pdm09 has increased (59%), while the shares of seasonal influenza A (26%) and B (15%) are relatively constant.

    The number of people who searched for Vårdguiden.se for influenza-like illness increased during week 4 ( Web Search ), as well as the number of adults and children who rang in 1177 with a fever and cough as a contact reason ( Contact Causes 1177 ).

    In summary, all speak for reporting increasing influenza activity in Sweden. Like four seasons in five acts flu peak coming in February, but exactly when and how high it will be, we can not say for sure. Total lean year's flu curve slightly less steeply than last year, and so we can hope for a milder outbreaks than 2012th
    ...
    Figure 1 . Number of cases of laboratorieverierad influenza (all subtypes) per week and season.
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    ...

    Table 1 . Number of laboratory confirmed influenza cases, current week and cumulatively since week 40/2012, broken down by influenza A (H1N1) pdm09 and seasonal influenza A and B, and the number of samples analyzed and the percentage positive.
    Influenza type / Current Week / Cumulatively
    A (H1N1) pdm09 / 222 / 743
    Seasonal Influenza A / 159 / 802
    Seasonal influenza B / 64 / 266
    Total cases / 445 / 1,811
    Number of samples analyzed / 1,433 / 10,163
    Percentage of positive samples / 31.1% / 17.8%
    ...

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  • Ronan Kelly
    replied
    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, week 3 (14/1 -20 / 1), 2013
    Report on the current flu situation

    Editor: Hélène Englund

    Influenza in Sweden
    During week 3 were reported slightly more laboratory confirmed influenza cases than last week, 361 compared to 320 ( Table 1 and Table 2 ), but the increase seems to have leveled off. Even in other countries in Europe are the same trend (see Influenza in the world ). From outpatient reported slightly more patients with influenza-like illness (see Sentinel Surveillance ) and even syndromic surveillance Web Search is still upward. The sentinel sampling was 23% of the samples taken during week 3 positive for influenza virus. This proportion has fallen two weeks in a row from 37% in week 1.

    We continue to influenza A (H1N1) pdm09 mainly affects children under four years of age and adults between 15 and 64 years, while other influenza A primarily affects the elderly over 65 years. Approximately thirty percent of the reported cases of influenza A (H1N1) pdm09 has been reported as hospitalized. Of these, 49% had one or more risk factors for severe disease, in which the most common were immunocompromised, chronic heart or lung disease. So far the season has been two deaths reported. Both of them suffered from severe underlying disease.

    The overall picture suggests that the flu could be on track to reach its peak and that the season may be milder than it was last season when the 2011-2012 influenza A (H3) dominated.

    Figure 1 . Number of cases of laboratorieverierad influenza (all subtypes) per week and season.
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    ...
    Table 1 . Number of laboratory confirmed influenza cases, current week and cumulatively since week 40/2012, broken down by influenza A (H1N1) pdm09 and seasonal influenza A and B, and the number of samples analyzed and the percentage positive.
    Influenza type / Current Week / Cumulatively
    A (H1N1) pdm09 / 180 / 521
    Seasonal Influenza A / 145 / 647
    Seasonal influenza B / 36 / 194
    Total cases / 361 / 1,362
    Number of samples analyzed / 1,222 / 8,602
    Percentage of positive samples / 29.5% / 15.8%

    ...

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  • Ronan Kelly
    replied
    Re: Institute for Disease Control weekly reports winter 2012-2013

    Influenza Report, Week 2 (7/1 - 13/1), 2013
    Report on the current flu situation

    Editor: Hélène Englund

    Contents
    Influenza in Sweden
    Influenza activity increased in the country, even during week 2 ( Figure 1 ). In total 304 cases of reported laboratory confirmed influenza, compared with 231 cases reported in week 1. Of these, 135 influenza A (H1N1) pdm09 ("swine flu"), 121 cases seasonal influenza A and 48 cases, influenza B ( Table 1 and Table 2 ), some A (H1N1) pdm09 cases have since been reported and diagnosed earlier in the season.

    The increase in the number of laboratory-confirmed cases of seasonal influenza A seems to have stalled somewhat, while influenza B and A (H1N1) pdm09 continues to increase ( Figure 3 ). Development continues to resemble the 2010-2011 season, when we had a moderate and fairly early outbreak of A (H1N1) pdm09, but got a sharp peak of influenza B late in the season. Because all influenza seasons develop differently, it is difficult to predict what the near future will be developed, but it appears so far that the spread of A (H1N1) pdm09 has not accelerated as much in Sweden as it has previously done in Norway.

    Influenza A (H1N1) pdm09 has primarily been demonstrated among children between 0 and 4 years of age and in adults between 15 and 30 years, while seasonal influenza A was most common in people over 65. Influenza B has so far affected all age groups fairly evenly. According to the clinical notifications for A (H1N1) pdm09 has all season 111 patients hospitalized, 12 of which have needed intensive care. The majority of intensive caring has been between 40 and 75 years. A man in late middle age with several underlying and serious risk factors for severe disease have died. His vaccination status is still unclear.

    A (H1N1) pdm09 found throughout the country ( Table 3. Number of reported A (H1N1) pdm09 cases per county ). Incidence week 2 was still highest in Värmland, but the outbreak appears to still be decaying there ( Figure 2 ). (After the reporting of influenza A (H1N1) pdm09 cases causing an apparently higher incidence of Västra Götaland and Södermanland for week 2 than would otherwise be the case.)

    The sentinel reporting, we are above the baseline for the proportion of doctor visits for influenza-like illness (ILI) outpatient ( Figure 4 ). For week 2 reported 10.8 people per 100 000 inhabitants have sought medical advice because of ILS ( Table 4 ). within sentinel sampling, the number of submitted samples almost doubled from week 1, a total of 127 samples were received during the two weeks compared to 65 weeks samples first The percentage of positive samples for influenza have decreased from 40% to 23% ( Figure 5-6 , Table 5-6 ). This suggests that other than influenza viruses currently gives flu-like illness (see Other viral causes of respiratory infections in Sweden ) Web Searchlight graph of the number of people who searched for Vårdguiden.se for influenza-like illness plateaued at week 2 ( Web Search ). The number of people contacted in 1177 with questions about fever, cough and sore throat in adults and children fell for the second week in a row, but the number of searches is higher than normal for the season.

    In summary, talking reports of care for increasing influenza activity, but the intensity is still normal for the season.

    We would once again like to remind you that this year's seasonal vaccine contains three virus types circulating including A (H1N1) pdm09, and that there is the same vaccine that was given in the context of the pandemic. Seasonal vaccine has now been over three seasons to an estimated 1 billion people worldwide without any notable adverse reactions have been identified.

    Information on seasonal vaccine and who belong to the risk group for severe disease and therefore recommended vaccinations available on the Board's website .
    More detailed information on this year's vaccines are on SMI's website .

    ...

    Table 1 . Number of laboratory confirmed influenza cases, current week and cumulatively since week 40/2012, broken down by influenza A (H1N1) pdm09 and seasonal influenza A and B, and the number of samples analyzed and the percentage positive.
    Influenza type / Current Week / Cumulatively
    A (H1N1) pdm09 / 135 / 342
    Seasonal Influenza A / 121 / 464
    Seasonal influenza B / 48 / 159
    Total cases / 304 / 965
    Number of samples analyzed / 1209 / 7314
    Percentage of positive samples / 25.1% / 13.2%
    ...
    Figure 1 . Number of cases of laboratorieverierad influenza (all subtypes) per week and season.
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    ...

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