Assessing Change in Avian Influenza A
Xiang, N., Li, X., Ren, R., et al. (2016). Assessing Change in Avian Influenza A(H7N9) Virus Infections During the Fourth Epidemic – China, September 2015-August 2016. Morbidity and Mortality Weekly Report. 65(49):1390-1394.
The authors compared epidemiology and virology data from the fourth wave of human cases of avian influenza A H7N9 in China to the preceding waves. The fourth wave had a longer duration, greater geographic spread, a higher proportion of cases in rural areas, and higher percentage patients requiring admission to intensive care. However, the case fatality rate remained at approximately 40% and the authors found no evidence of sustained human to human transmission or increased transmissibility to humans from poultry or environmental exposures.