Influenza

Influenza update

2 October 2014 - Update number 222

Summary

Globally, influenza activity remained low, with the exception of some tropical countries in the Americas and some Pacific Islands.

  • In Europe and North America, overall influenza activity remained at inter-seasonal levels.
  • In tropical countries of the Americas, influenza B co-circulated with respiratory syncytial virus (RSV).
  • In Africa and western Asia, influenza activity was low.
  • In eastern Asia, influenza activity in most countries remained low or decreased after some influenza A(H3N2) activity in August and September.
  • In tropical Asia, influenza activity continued to decrease or remain low with influenza A(H3N2) predominant.
  • In the southern hemisphere, influenza activity decreased in general except in several Pacific Islands where ILI activity remained high. In the temperate zone of South America, influenza-like illness (ILI) decreased and continued to be associated with RSV. Influenza A(H3N2) virus was the most frequently detected influenza virus. In Australia and New Zealand Influenza activity also decreased.
  • The WHO recommendation on the composition of influenza vaccines for the southern hemisphere 2015 was announced on 25 Sept. The recommendation and associated technical report are posted at the WHO website: http://www.who.int/influenza/vaccines/virus/recommendations/2015_south/en/
  • Due to changes in data collection platforms, data from the WHO Regional Office for Europe are temporarily not available at global level. Those data will be uploaded to FluNet and FluID as soon as possible. Information on European influenza activity can be found at http://www.flunewseurope.org/

Full influenza update


For regional updates on influenza see the following links


For updates on the influenza at the human-animal interface see the following WHO web pages:


Source of data

The Global Influenza Programme monitors influenza activity worldwide and publishes an update every two weeks.
The updates are based on available epidemiological and virological data sources, including FluNet (reported by the WHO Global Influenza Surveillance and Response System) and influenza reports from WHO Regional Offices and Member States. Completeness can vary among updates due to availability and quality of data available at the time when the update is developed.

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