儿童自身免疫系统发育不健全,适应环境能力差,缺乏自我保护意识,集体生活的条件下密切接触多,因此易感染疾病[1-2]。托幼机构是儿童生活、学习和活动的重要场所,也是传染病疫情高发场所,而这类场所一旦发生传染病事件,不但会影响儿童身心健康,也会给家庭乃至社会带来巨大 Children’s autoimmune system is not well developed, poor adaptability to the environment, lack of awareness of self-protection, close contact with the collective living conditions, and therefore susceptible to disease [1-2]. Kindergartens and nurseries are important places for children’s life, study and activities. They are also places where infectious diseases are endemic. Once an infectious disease occurs in such places, not only will children’s physical and mental health be affected, but also enormous families and even the community will be brought