推荐回答（3个）
传染病在人群中的传播必须具备三个条件：即传染源、传播途径和易感人群。打断其中任何一个环节，就能控制传染病的流行。
控制传染源
首先要隔离病人，因为病人是重要的传
染源。一般在疾病高峰阶段大量排细菌或病毒，但很多传染病在出现症状前已排毒或排菌，如腮腺炎(大嘴巴)。在腮腺肿大前6天已能排出有传染性的病毒，这就是为什么将病人隔离后仍继续出现腮腺炎病儿的原因。幼托机构必须加强每天上午的晨间检查，早期发现传染病，达到早诊断、早隔离、早治疗。 病原携带者也是可碌拇�驹矗�缫倚透窝撞《镜男��摺⒕�〉拇��摺U饫嗪⒆颖旧砜晌奕魏沃⒆矗�灰妆蝗朔⑾郑��山���南妇�⒉《敬�靖�渌�⒆印K�裕�杂芯�∈芳敖�谟懈剐赫撸�胪腥朐笆币欢ㄒ�龃蟊闩嘌�?
切断传染途径
冬春季节好发呼吸道传染病，应定时开窗通风，阳光中的紫外线是最好的消毒剂。婴幼儿应避免到人多拥挤的公共场所去玩，天冷时外出乘车要戴口罩。肠道传染病主要是"病从口入"，要切实做好饮食卫生，个人卫生，饭前便后洗手，玩具消毒等。要消灭"四害"，尤其是灭蝇。
保护易感儿
这类小儿缺乏对疾病免疫力，故提高其免疫力，除通过体育锻炼增强体质外，更重要的是按时预防接种。世界卫生组织要求，1岁以内完成卡介苗、麻苗、小儿麻痹症糖丸、"百白破"的接种。"四苗"接种占应种对象的80％，同时接种需全程，如"百白破"要接种3次，小儿麻痹症糖丸1岁内服2次，1~2岁加服2次，这样才能达到预防小儿常见传染病的目的。
开窗通风是为了置换室外新鲜空气，辟如公共场所（影剧院、OK厅、多人居住宿舍）人多密闭，空气混浊，二氧化碳高，空气含菌量多，因此需要将外界空气换入。而有些菌，如流行性脑膜炎菌则在含10%的二氧化碳中存活时间长。
如果是如你说，可以视情况来定，通风时间放在清晨等外环境污染少时，开门通风也一样起作用。如果外环境卫生尚不如室内，就不要实时通风，以免适得其反。
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