作者曾于1974年至1977年间,用OKA株水痘活疫苗接种了282名健康儿童与患病儿童.本文报道对其中147名儿童所作的长期观察结果.7～10年的随访研究发现,尽管这些儿童与水痘患儿有过密切接触,但只有5人发生水痘,发病率为3%.这5人中,1人在接种后3年发病,表现为典型水痘.另4 The authors vaccinated 282 healthy children and sick children with the OKA strain of varicella live vaccine between 1974 and 1977. This article reports on long-term observations of 147 of these children. A 7-10-year follow-up study found that, despite these Children with chickenpox have had close contact with children, but only 5 people have chickenpox, the incidence rate was 3% .Among them, 1 outbreak occurred 3 years after inoculation, showing typical chickenpox.Other 4