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: H?l?ne 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 V?rmland 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 ?r.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 V?rdguiden.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
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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%
...
Influenza Report, Week 4 (21/1 -27 / 1), 2013
Report on the current flu situation
Editor: H?l?ne 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 V?rmland 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 ?r.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 V?rdguiden.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.
...
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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