Influenza

Influenza is an acute viral infection that spreads easily from person to person. It circulates worldwide causing epidemics, and can affect individuals in any age group. In addition to seasonal epidemics, influenza pandemics can occur when a new influenza virus subtype emerges.

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Top story

Protecting vulnerable groups from inflluenza

EuroFlu Weekly Bulletin

Week 14: Influenza activity returns to pre-season levels in Europe

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Other respiratory pathogens

Middle East respiratory syndrome coronavirus (MERS-CoV)

This novel coronavirus was first reported to WHO in September 2012. The majority of cases have respiratory disease, from mild symptoms to severe pneumonia. The newest cases reported indicate that the source of infection remains active in the Middle East and is present throughout a large area.

More information, situation updates and WHO guidelines

Avian influenza A(H7N9)

Avian influenza A(H7N9) is one subgroup among the larger group of H7 viruses, which normally circulate among birds. The first reports of human infections with this new strain, detected in China, were reported to WHO on 31 March 2013.

More information, situation updates and WHO guidelines

Newsletter

Flu Focus

Information and resources on influenza in the WHO European Region

Data and statistics

Up to 20%

of the population in the northern hemisphere is affected by annual influenza epidemics during autumn and winter.

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Multimedia

Flu: the 5 things everyone needs to know