1989年,美洲区脊灰疫苗(OPV)接种率维持在较高的水平。仅巴西西北部、Andeam 地区北部和墨西哥西北部的六个国家存有脊灰野病毒引致的麻痹病例,而1990年至今仅发生4例。本文介绍了美洲区消灭脊灰的进展,并展望未来,现摘译如下。一、免疫策略在消灭脊灰活动的初期,按1985年前三年有无脊灰病例,将所有国家分为“脊灰地方性流行”和“无脊灰病例”两类。对于“地方性流行”的国家,鼓励他们每年开展 In 1989, the rate of polio vaccination (OPV) in the Americas remained at a high level. Only poliovirus-induced paralysis cases were reported in the northwestern part of Brazil, northern Andeam and northwestern Mexico, as compared with only 4 in 1990. This article describes the progress of polio eradication in the Americas and looks to the future. First, the immunization strategy In the early era of polio eradication, according to the first three years of 1985 there is no polio cases, all countries are divided into “polio endemic” and “polio-free cases” two categories. For “endemic” countries, encourage them every year