Recommended composition of influenza virus vaccines for use in the 2011-2012 northern hemisphere influenza season.

Recommended composition of influenza virus vaccines for use in the 2018 southern hemisphere influenza season.

The World Health Organization (WHO) convenes technical consultations in February/March and September each year to recommend viruses for inclusion in influenza vaccines for the northern and southern hemisphere influenza seasons, respectively. This recommendation relates to the influenza vaccines for use in the forthcoming southern hemisphere 2018 influenza season. A recommendation will be made i...

Recommended composition of influenza virus vaccines for use in the 2018–2019 northern hemisphere influenza season.

Between September 2011 and January 2012, influenza activity was reported in Africa, the Americas, Asia, Europe and Oceania. Influenza A(H1N1)pdm09 viruses circulated at very low levels in general with the exception of some countries in Asia and the Americas. Influenza A(H3N2) viruses were predominant in Europe, many countries in the Americas and northern Africa and some countries in Asia. Influ...

Recommended composition of influenza vaccines for use in the 2012 southern hemisphere influenza season.

Recommended composition of influenza virus vaccines for use in the 2014-2015 northern hemisphere influenza season.

Recommended composition of influenza virus vaccines for use in the 2013–2014 northern hemisphere influenza season.