Ronan Kelly
Retired 2020
Re: 2012-2013: HPA Weekly National Influenza Reports.
Re: 2012-2013: HPA Weekly National Influenza Reports.
Summary
HPA Weekly National Influenza Report
Summary of UK surveillance of influenza and other seasonal respiratory illnesses
07 February 2013 ? Week 6 report (up to week 5 data)
While some indicators of influenza activity across England have remained stable compared to the previous week, some indicators have slightly increased and outbreaks and hospitalisations continue to be reported. A letter has been issued to the NHS that GPs may now prescribe antiviral medicines for the prophylaxis and treatment of influenza in accordance with NICE guidance.
Overall weekly influenza GP consultation rates across the UK o In week 5 (ending 3 February 2013), the weekly primary care ILI consultation rate remained stable in England (12.7 per 100,000) and Northern Ireland (48.4 per 100,000) and increased in Wales (19.9 per 100,000) and Scotland (44.2 per 100,000).
o In week 5 2013, the weekly proportion of NHS Direct calls for cold/flu and fever (5-14yrs) remained below their respective influenza thresholds of 1.6% and 11.7%.
o 28 acute respiratory disease outbreaks have been reported in the past seven days compared to 18 the previous week. Eleven had a virological result available (four influenza A(unsubtyped), four B, two A(H3) and one A(H1N1)pdm09).
Virology
o 218 influenza positive detections (97 B, 66 A subtype not known, 38 A(H3) and 17 A(H1N1)pdm09) were recorded through the DataMart scheme (overall positivity of 23.2% compared to 19.2% the previous week).
o The proportion of samples positive in DataMart (England) increased for rhinovirus and remained stable for RSV, hMPV, adenovirus and parainfluenza.
o 42 influenza positive detections were recorded through the two English GP-based sentinel schemes in week 5 (18 B, 17 A(H3) and 7 A(H1N1)pdm09), giving a positivity of 42% compared to 44% in week 4.
Disease severity and mortality
o 36 new admissions to ICU/HDU with confirmed influenza (14 A(subtype not known), 12 B, five A(H1N1)pdm09 and five A(H3N2) were reported through the USISS mandatory ICU surveillance scheme across the UK (137 Trusts in England) in week 5. 78 new hospitalised confirmed influenza cases have been reported through the USISS sentinel hospital network across England (26 Trusts).
o In week 5 2013, overall excess all-cause mortality was seen in Northern Ireland and none was seen in England, Scotland and Wales. This data is provisional due to the time delay in death registration.
Influenza vaccination
o Up to week 4, 73.2% of people in England aged 65 years and over had received the 2012/13 influenza vaccine (provisional data). For those in a clinical risk group aged under 65 years, provisional uptake was 50.8%. Amongst pregnant women, the provisional uptake was 39.7%.
o A mid-season analysis assessing the effectiveness of the trivalent influenza vaccine in the UK in this season (2012/13) has been published in Eurosurveillance. An overall adjusted vaccine effectiveness of 51% (95% confidence interval 27% - 68%) was reached against all laboratory-confirmed influenza in primary care, which is within the expected range of effectiveness of a trivalent influenza vaccine.
International situation
o During week 4 2013, influenza activity continued to rise across Europe, although the epidemic may have passed its peak in some north-western countries.
o Influenza activity in North America remains high regionally, though nationally most indicators of transmission have begun to decrease.
o The patterns of influenza virus co-circulation being identified in Europe are different from that being reported by North America.
...
-In week 5, 36 new admissions to ICU/HDU with confirmed influenza infection (14 A unknown subtype, 12 B,
five A(H1N1)pdm09, and five A(H3N2) were reported across the UK (137/163 Trusts in England) through the
USISS mandatory ICU scheme (Figures 12 and 13). Two new confirmed influenza deaths were reported in
week 5 2013. A total of 403 admissions (178 B, 103 A unknown subtype, 65 A(H3N2) and 57
A(H1N1)pdm09) have been reported since week 40 2012. Forty confirmed influenza deaths (15 B, 10
A(H3N2), nine A unknown subtype and six A(H1N1)pdm09) have been reported across the UK in ICU/HDU
since week 40 (Figure 12).
...
http://www.hpa.org.uk/webc/HPAwebFile/HPAweb_C/1317138019053
Re: 2012-2013: HPA Weekly National Influenza Reports.
Summary
HPA Weekly National Influenza Report
Summary of UK surveillance of influenza and other seasonal respiratory illnesses
07 February 2013 ? Week 6 report (up to week 5 data)
While some indicators of influenza activity across England have remained stable compared to the previous week, some indicators have slightly increased and outbreaks and hospitalisations continue to be reported. A letter has been issued to the NHS that GPs may now prescribe antiviral medicines for the prophylaxis and treatment of influenza in accordance with NICE guidance.
Overall weekly influenza GP consultation rates across the UK o In week 5 (ending 3 February 2013), the weekly primary care ILI consultation rate remained stable in England (12.7 per 100,000) and Northern Ireland (48.4 per 100,000) and increased in Wales (19.9 per 100,000) and Scotland (44.2 per 100,000).
o In week 5 2013, the weekly proportion of NHS Direct calls for cold/flu and fever (5-14yrs) remained below their respective influenza thresholds of 1.6% and 11.7%.
o 28 acute respiratory disease outbreaks have been reported in the past seven days compared to 18 the previous week. Eleven had a virological result available (four influenza A(unsubtyped), four B, two A(H3) and one A(H1N1)pdm09).
Virology
o 218 influenza positive detections (97 B, 66 A subtype not known, 38 A(H3) and 17 A(H1N1)pdm09) were recorded through the DataMart scheme (overall positivity of 23.2% compared to 19.2% the previous week).
o The proportion of samples positive in DataMart (England) increased for rhinovirus and remained stable for RSV, hMPV, adenovirus and parainfluenza.
o 42 influenza positive detections were recorded through the two English GP-based sentinel schemes in week 5 (18 B, 17 A(H3) and 7 A(H1N1)pdm09), giving a positivity of 42% compared to 44% in week 4.
Disease severity and mortality
o 36 new admissions to ICU/HDU with confirmed influenza (14 A(subtype not known), 12 B, five A(H1N1)pdm09 and five A(H3N2) were reported through the USISS mandatory ICU surveillance scheme across the UK (137 Trusts in England) in week 5. 78 new hospitalised confirmed influenza cases have been reported through the USISS sentinel hospital network across England (26 Trusts).
o In week 5 2013, overall excess all-cause mortality was seen in Northern Ireland and none was seen in England, Scotland and Wales. This data is provisional due to the time delay in death registration.
Influenza vaccination
o Up to week 4, 73.2% of people in England aged 65 years and over had received the 2012/13 influenza vaccine (provisional data). For those in a clinical risk group aged under 65 years, provisional uptake was 50.8%. Amongst pregnant women, the provisional uptake was 39.7%.
o A mid-season analysis assessing the effectiveness of the trivalent influenza vaccine in the UK in this season (2012/13) has been published in Eurosurveillance. An overall adjusted vaccine effectiveness of 51% (95% confidence interval 27% - 68%) was reached against all laboratory-confirmed influenza in primary care, which is within the expected range of effectiveness of a trivalent influenza vaccine.
International situation
o During week 4 2013, influenza activity continued to rise across Europe, although the epidemic may have passed its peak in some north-western countries.
o Influenza activity in North America remains high regionally, though nationally most indicators of transmission have begun to decrease.
o The patterns of influenza virus co-circulation being identified in Europe are different from that being reported by North America.
...
-In week 5, 36 new admissions to ICU/HDU with confirmed influenza infection (14 A unknown subtype, 12 B,
five A(H1N1)pdm09, and five A(H3N2) were reported across the UK (137/163 Trusts in England) through the
USISS mandatory ICU scheme (Figures 12 and 13). Two new confirmed influenza deaths were reported in
week 5 2013. A total of 403 admissions (178 B, 103 A unknown subtype, 65 A(H3N2) and 57
A(H1N1)pdm09) have been reported since week 40 2012. Forty confirmed influenza deaths (15 B, 10
A(H3N2), nine A unknown subtype and six A(H1N1)pdm09) have been reported across the UK in ICU/HDU
since week 40 (Figure 12).
...
http://www.hpa.org.uk/webc/HPAwebFile/HPAweb_C/1317138019053