Giuseppe
Emeritus
Source: European Centre for Disease Prevention and Control: http://www.ecdc.europa.eu/en/public...UR_Weekly_Influenza_Surveillance_Overview.pdf
UK: HPA Influenza http://www.hpa.org.uk/infections/topics_az/influenza/seasonal/default.htm and DH (England) http://winterwatch.dh.gov.uk/
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UK: HPA Influenza http://www.hpa.org.uk/infections/topics_az/influenza/seasonal/default.htm and DH (England) http://winterwatch.dh.gov.uk/
- In week 7, the number of patients in England with confirmed or suspected influenza in critical care beds have declined further from its peak of nearly 800 (equivalent to 1.4 per 105 population) to around 70 cases on 17 February .
- Up to 16 February 2011, 494 deaths have been reported in individual influenza cases from across the UK.
- Ninety-three per cent of the cases with additional information were associated with A(H1N1) 2009 1% with untyped influenza A and 6% with influenza B infection.
- Reported deaths associated with influenza have been mainly in younger adults and children.
- Amongst cases with information on age, 4% have been less than 5 years; 4% between 5 to 14 years; 72% from 15 to 64 years and 20% were 65 years or older.
- Of those with available information 70% were in one of the clinical risk groups where vaccination is recommended, which includes pregnant women.
- The most numerous reported clinical risk factors were underlying respiratory disease including asthma and immunosuppression.
- Of cases with information on immunisation history 72% had not received the 2010 trivalent vaccine and 95% had not received the monovalent pandemic vaccine last season.
- All-cause all-age deaths (due to multiple causes not just influenza) declined again in week 4 and is now well below the upper statistical limit of expected levels for this time of year.
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