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联合国世界卫生组织(WHO)1978年发起了扩大免疫活动(简称EPI)即用预防接种(免疫)的方法防止严重威胁婴儿的6种传染病(百日咳、白喉、破伤风、脊髓灰质炎、麻疹和结核)。世界上已有144个国家与地区参加了这个活动。据WHO最新估计,发展中国家对6种传染病的免疫,每年拯救了大约800,000名婴儿的生命。按EPI全球顾问小组要求“到1990年全世界的儿童都要接受百日
The United Nations World Health Organization (WHO) launched the Expanded Immunization Program (EPI) in 1978 to prevent the occurrence of 6 infectious diseases (pertussis, diphtheria, tetanus, poliomyelitis and measles tuberculosis). 144 countries and regions in the world have participated in this activity. According to the latest WHO estimates, developing countries are immunized against six infectious diseases and saved about 800,000 babies each year. According to the EPI Global Advisory Panel, "By 1990 children in the world will have to accept a hundred days