Hand, foot and mouth disease in Yunnan Province, China, 2008-2010.

This study was done to assess the epidemic features of hand, foot and mouth disease in Yunnan Province. Surveillance data from the beginning of 2008 through the end of 2010 were analyzed to conduct the demographic data of patients and morbidity as well as the estimation between possible risk factors for severe or fatal cases. Of the 75109 cases reported, laboratory tests confirmed 3691 cases. Thus, the average annual incidence proportion was 55 per 100000 population with a total case fatality rate of 0.04%. A seasonal peak was observed in May, along with a smaller winter peak in 2010. Most severe and fatal cases were caused by enterovirus 71. It is demonstrated that most of the severe and fatal cases occurred in very young children and that delayed access to health care led to the higher likelihood of serious illness.