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美国于1969年普遍实施风疹疫苗接种计划,计划实施后不久,向疾病控制中心报告的风疹病例数明显下降.1970～1975年,对哥伦比亚特区、芝加哥市和科罗拉多州三地的风湿热发病情况进行了调查,发现在风疹发病减少时,风湿热病例数也呈平行下降.1970年哥伦比亚特区有12,501个住宅单元,每个房间住1.51个以上的人.人群的链球菌分离物数目没有下降.1975～1983年作者对该区5,000名儿童(大都是三年级和六年级学生)进行了调查,并特别注意风湿性心脏病的发病情况,只发现3例病人,其中1例是从特立尼达迁居而来的.鉴于易感儿童为
The United States conducted a universal rubella vaccination program in 1969. The number of cases of rubella reported to the Centers for Disease Control decreased significantly shortly after the program was implemented. The incidence of rheumatic fever was reported to the District of Columbia, Chicago and Colorado from 1970 to 1975 The survey found that there was a parallel decrease in the number of cases of rheumatic fever when the incidence of rheumatism decreased, with a total of 12,501 residential units in the District of Columbia in 1970, with more than 1.51 people living in each room. There was no decline in the population of streptococcal isolates. In 1983, the author investigated 5,000 children in the district, mostly third and sixth graders, and paid particular attention to the incidence of rheumatic heart disease. Only three patients were found, of which one was from Trinidad Moved in. In view of susceptible children