Evolutionary characteristics of A/Hangzhou/1/2013 and source of avian influenza virus H7N9 subtype in China

摘要

A patient with an influenza-like illness was first admitted to a hospital in Shanghai on 19 February 2013, and another similar case appeared 8 days later. Both patients died after approximately 2 weeks. The National Health and Family Planning Commission of China officially affirmed the pathogen being a new avian influenza virus (AIV) H7N9 subtype. Up to 20 April, 87 cases in humans were confirmed, 17 of whom died [1]. This study investigated the source of the virus and evolution.