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Weekly Influenza Activity Report

Current level of activity:
Low
Trend: Increased compared to last week
News:
Evidence of influenza circulation at low levels in Wales
Update – Influenza A(H7N9) in China and Middle East respiratory syndrome coronavirus (MERS-CoV)
 
Published: 16 April 2014
 
Clinical consultation rate per 100,000 practice population in
Welsh sentinel practices (as of 16/04/14)

*Reporting through Audit+ commenced during 2010 week 40.
 

Key points:

In Wales

Flu activity surveillance update
  • Surveillance data suggest that influenza virus is circulating in Wales at low levels.
  • The consultation rate for influenza in Wales during week 15 (week ending 13/04/2014) reported through the GP Sentinel Surveillance of Infections Scheme is 6.4 consultations per 100,000 practice population.
  • The consultation rate increased compared to the rate for the previous week (5.9 consultations per 100,000).
  • The provisional consultation rate was highest in patients aged 35-44 years (23.4 per 100,000).

Virological surveillance update

  • Four samples were collected by sentinel GPs from patients with influenza symptoms during week 15. Two samples tested positive for influenza A(H1N1)pdm09. The remaining two samples tested negative for all eight respiratory pathogens tested for.

Influenza vaccine uptake rates in Wales 2013/14

Based on data from 88% of Welsh practices, reported through Audit+, as at 08/04/2014:

  • 68.3% of patients aged 65 years and older have been vaccinated against influenza (Health Board range 65.4% to 70.7%).
  • 51.1% of patients aged six months to 64 years in at-risk groups have been vaccinated against influenza (HB range 45.3% to 55.3%).
Based on data provided by Health Board Occupational Health Departments and NHS Trusts, up to the end of February 2014:
  • 40.6% of NHS staff have been vaccinated against influenza (HB / Trust range 30.2% to 52.2%).

In the UK and Europe

  • During week 14 (latest available report) influenza activity remained low in England, Scotland and Northern Ireland. UK summary data is available from the Public Health England National Influenza Report.
  • Euroflu report that during week 14 (latest available report), influenza activity returned to pre-season or below baseline levels in most countries in the WHO European Region. For more information on European level influenza surveillance see: http://www.euroflu.org

World Overview

  • The WHO report that as of 24/03/14, in North America influenza activity continued to decrease, suggesting the influenza season is coming to a close, though a small increase in influenza B was noted in the region.
  • In Europe, influenza activity increased in eastern regions but decreased in the southwestern and northern regions, with both influenza A viruses circulating.
  • In eastern Asia influenza activity declined with a slight increase of influenza B activity observed. Influenza activity was stable in China while activity in Mongolia remained elevated.
  • In Tropical Asia influenza activity has largely decreased, however Thailand reported sustained elevated influenza A(H1N1)pdm09 activity and an increase in the proportion of influenza B reported.
  • Influenza activity in northern Africa and western Asia decreased overall, however the proportion of influenza B positive samples increased.
  • Based on FluNet reporting (as of 20/03/2014) during weeks 9 to 10 (23/02/2014 – 08/03/2014) National Influenza Centres and other national influenza laboratories from 96 countries, areas or territories reported influenza surveillance data. The WHO Global Influenza Surveillance and Response System laboratories tested more than 74,758 specimens, of which 13,548 were positive for influenza viruses. Of these, 10,289 were typed as influenza A (4,470 influenza A(H1N1)pdm09, 2,410 influenza A(H3N2) and 3,409 influenza A(not sub-typed) and 3,259 influenza B (222 belonged to the B-Yamagata lineage and 32 to the B-Victoria lineage).
  • See WHO influenza update: http://www.who.int/influenza/surveillance_monitoring/updates/en/
 

Report Archive

Weekly Influenza Surveillance Reports for Wales: October 2013-September 2014 (Flu Season 2013/14)
Please select the required report from the drop-down list below and then press 'Go'
 
 
Weekly Influenza Surveillance Reports for Wales: October 2012-September 2013 (Flu Season 2012/13)
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Weekly Influenza Surveillance Reports for Wales: October 2011-September 2012 (Flu Season 2011/12)
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Weekly Influenza Surveillance Reports for Wales: October 2010-September 2011 (Flu Season 2010/11)
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Weekly Influenza Surveillance Reports for Wales: April 2009-October 2010 (H1N1 Swine Flu Pandemic and Post Pandemic)
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Weekly Influenza Surveillance Reports for Wales: October 2008-April 2009 (Flu Season 2008/09)
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Reports of influenza rates in the UK and Europe can also be obtained from the links below:


Last updated: 16/04/2014