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目的了解水痘发病儿童中接种过1剂次水痘疫苗(Var V)后发病的流行特征。方法通过电话或查阅“宁波市免疫规划信息系统”调查宁波市2012—2013年1~9岁儿童病例Var V接种史,采用描述性流行病学方法进行分析。结果共调查1~9岁儿童水痘病例2 436例,其中明确有Var V免疫史且有确切接种时间的805例,其疫苗接种日期至发病日期的间隔时间平均为(3.64±2.17)年;按散居儿童、托幼儿童和学生分别统计接种疫苗日期至发病日期间隔时间,中位数分别为1.33、3.58和5.67年。结论 1岁儿童接种1剂次Var V后,其发病时间与距接种间隔年数平均在4年左右。
Objective To understand the prevalence of prevalent varicella (Var V) vaccination in children with chickenpox. Methods The epidemiology of descriptive epidemiology was used to investigate the vaccination history of Var V in children aged from 1 to 9 years in Ningbo between 2012 and 2013 by phone or by referring to “Ningbo Immunization Planning Information System”. Results A total of 2 436 chickenpox cases were investigated in children aged 1-9 years. Among them, 805 cases were confirmed with the history of Var V immunization and the average inoculation time was 3.64 ± 2.17 years Diving children, nurseries and toddlers and students separately counted the vaccination dates from the date of onset to the time of onset, with a median of 1.33, 3.58 and 5.67 years respectively. Conclusions The 1-year-old children were vaccinated with 1 dose of Var V and the average onset time and the number of years of vaccination were about 4 years.