April 10, 2013, ECDC: On 31 March 2013, the Chinese health authorities announced that they identified a novel influenza A(H7N9) virus in three seriously ill patients. As of 9 April 2013, 26 human cases of infection with influenza A(H7N9) virus have been reported in four provinces of China: Shanghai (13), Jiangsu (8), Zhejiang (3) and Anhui (2). Of these patients, 8 people have died, 15 are severe cases and 3 are mild cases. No epidemiological link has been identified among cases. The source of these infections and the mode of transmission are yet to be determined. This is the first time that human infection with influenza A(H7N9) virus has been identified. No vaccine is currently available for this subtype of the influenza virus. Preliminary test results suggest that the virus is susceptible to the neuraminidase inhibitors (oseltamivir and zanamivir).