水痘是一种常见、多发、有高度接触传播性的儿童传染病,发热的同时伴有全身散发瘙痒性疱疹。水痘无特效的药物可以治疗,最有效、最可靠的预防和控制措施是接种冻干水痘减毒活疫苗(Varv-Fd)[1],在水痘暴发或流行时作应急接种,可缩短疫情持续时间,降低发病率[2]。2009年6月13日上午,江苏省盐城市阜宁县某中学南校区发生水痘暴发,阜宁县疾病预防控制中心接到报告 Chickenpox is a common, multiple and highly contagious childhood infection that is accompanied by fever and itchy body sores. The most effective and reliable preventive and control measures for varicella-free vaccines are varicella vaccination (Varv-Fd) [1], which can be used to vaccinate against varicella outbreaks or epidemics to shorten the duration of the outbreak Time, reduce the incidence [2]. On the morning of June 13, 2009, an outbreak of chickenpox occurred in the south campus of a high school in Funing County, Yancheng City, Jiangsu Province. The Funing County Center for Disease Control and Prevention received a report