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1989年美国免疫实施咨询委员会推荐4～6岁学龄儿童接种第2剂麻疹疫苗,而美国儿科学会推荐10～11岁接种第2剂麻疹疫苗.作者对接种单剂麻疹疫苗后4～11年血清学阴性的学龄儿童再接种的成功率作了评价.选择美国明尼苏达州奥姆斯特德县和加拿大北纽芬兰和拉布拉多进行大规模横断面血清流行病学调查.在北纽芬兰和拉布拉多收集603份7～11岁学龄儿童血清标本,在奥姆斯特德县收集887份5～12岁儿童血清
In 1989, the American Commission on Immunization Implementation recommended that school-age children aged 4 to 6 years receive the second measles vaccine while the American Academy of Pediatrics recommended the second measles vaccine 10 to 11 years old. The success rate of negative school-age children re-vaccination was evaluated by selecting large-scale cross-sectional serological epidemiological surveys from Olmsted, Minnesota, USA and North Newfoundland and Labrador, Canada In northern Newfoundland and Labrador collected 603 serum samples from school-age children aged 7 to 11 and collected 887 children aged 5 to 12 years old in Olmsted County