Cowling BJ, Jin L, Lau EH, Liao Q, Wu P, Jiang H, et al. Lancet. 2013 Jul 13;382(9887):129-37.
Background:
The novel influenza A H7N9 virus emerged recently in mainland China, whereas the influenza A H5N1 virus has infected people in China since 2003. Both infections are thought to be mainly zoonotic. We aimed to compare the epidemiological characteristics of the complete series of laboratory-confirmed cases of both viruses in mainland China so far.