Update on human cases of influenza at the human–animal interface, 2012

This report describes the epidemiology of the 32 laboratory-confirmed human infections with highly pathogenic avian influenza A(H5N1) virus that were reported to WHO from 6 countries during 2012, and summarizes the information on other zoonotic influenza infections – A(H3N2) variant, A(H1N1), A(H1N2) and A(H7N3) – reported in 2012 in humans.