As of 10th January 2014, 163 human cases of influenza A(H7N9) virus infection were reported to WHO. Of these cases, 50 died. Fifteen cases have been reported since the first of the year by China and its close neighbours.
Most human A(H7N9) cases have reported contact with poultry or live bird markets. Knowledge about the main virus reservoirs, and the extent and distribution of the virus in animals remains limited.