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作者自1970年9月后的4个月麻疹流行期间,在伯明罕调查了一个有707名学生的小学校。37名儿童患了麻疹。在37名患儿中25名(68％)接受过减毒或麻疹病毒疫苗。调查结果这所学校共有37名儿童最近患
The author investigated a 707-student primary school in Birmingham during the four-month measles epidemic after September 1970. Thirty-seven children had measles. Twenty-five (68%) of 37 children received attenuated or measles virus vaccine. Findings A total of 37 children in this school were recently affected