Analysis on the seasonality of hand-foot-and-mouth disease in Beijing from 2007 to 2015

Objective To explore the seasonal distribution characteristics of hand-foot-mouth disease(HFMD)in Beijing. Methods Concentration degree and circular distribution methods were used to analyze the seasonal distribution characteristics of HFMD incidence in Beijing from 2007 to 2015. Results The concentration degree analysis showed a M value of 0.58, indicating the seasonal distribution of HFMD. The circular distribution analysis showed that the peak time of HFMD was June 28, and the epidemic season of HFMD was from April 28 to August 28. Conclusions Epidemics of HFMD were clear seasonal distribution, which showed high degree of concentration in spring and summer and low in autumn and winter. Key words: Concentration degree; Circle distribution; Hand-foot-and-mouth disease; Seasonal Characteristics