20世纪90年代,随着市场经济的发展,人口流动成为一种趋势,并形成了以流动为显著特征的人口群体。由于多元因素作用,外来儿童与当地儿童免疫接种水平存在极大差距,甚至导致流入地免疫预防针对传染病发病上升。因此,如何做好外来儿童的免疫预防工作,特别是在低免疫接种率流动儿童 In the 1990s, with the development of market economy, population mobility became a trend and a population group characterized by mobility was formed. Due to the multiple factors, there is a huge gap between the level of immunization of foreign children and that of local children, and even lead to the rise of immunization prevention in inflow areas against infectious diseases. Therefore, how to do a good job in immunization of foreign children, especially in low-immunization rate of mobile children