Chen B, et al. – This work was aimed at investigating the temperature–dependent transition of patterns of reported chickenpox cases in two large subtropical climate cities, Wuhan and Hong Kong, China, to aid in the prediction of epidemics and preparation for the effects of climatic changes on epidemiology of chickenpox in China. Findings revealed marked influence of mean temperature and rainfall on the incidence of chickenpox, this suggested an important role of meteorological conditions as predictors of chickenpox incidence in Wuhan and Hong Kong.