目的 了解北京市房山区2008-01至2010-12水痘暴发疫情情况，为制订托幼园所、学校水痘疫情防制措施提供科学依据。

Objective To collect more information on infection outbreaks of chickenpox in Fangshan District of Beijing from January 2008 to December 2010 so as to take more effective precautions against chickenpox in kindergartens and schools. Methods The methods of descriptive epidemiology were used to analyze the frequency of infection outbreaks of chickenpox in Fangshan District from January 2008 to December 2010. Results A total of twenty-one outbreaks occurred in Fangshan District from January 2008 to December 2010. 193 cases were reported during the period, and the incidence rate was 1.72%. Fifteen outbreaks occurred in 2008，two in 2009，four in 2010. Five of these outbreaks occurred in kindergartens and sixteen in schools.Conclusions Chickenpox is highly infectious. Once the virus enters kindergartens or schools, it will spread rapidly. Strengthening surveillance，isolating the source of infection，emergency vaccination of susceptible populations, and disinfection are important measures to prevent the outbreak of chickenpox.