中国过去多年采取积极措施大规模开展疫苗接种获得显著效果,从而使麻疹发病和死亡大幅度下降,但目前世界各地每年仍有数十万人死于麻疹,大部分是5岁以下儿童[1-5]。近几年深圳市大力开展麻疹疫苗接种并对部分人群进行强化免疫,基本上控制了麻疹疫情。然而在2006年开始,深圳市的麻疹疫情又出现一定程度的反弹,突出的特点之一是婴幼儿麻疹发病率大大高于其他年龄组的发病率[2-4]。据不完全统计,目前龙岗区的户籍人口、暂住人口和流动人口达 In the past years, China has taken a proactive approach to achieving significant results in large-scale vaccination, resulting in a sharp drop in the incidence and death of measles. However, hundreds of thousands of measles deaths still occur each year in the world, most of whom are children under 5 [1- 5]. In recent years, Shenzhen vigorously carry out measles vaccination and intensive immunization of some people, basically controlled the epidemic of measles. However, a measly outbreak of measles outbreak in Shenzhen started in 2006. One of the prominent features is the much higher incidence of measles in infants and young children than in other age groups [2-4]. According to incomplete statistics, the household population, the temporary population and the floating population in Longgang District are currently up