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自1922年开始实行新生儿卡介苗接种以来,它的有效性一直没有得到世界的公认。印度医学研究委员会和世界卫生组织曾协作进行了一项关于卡介苗效果的前瞻性研究,涉及26万人,其中1月龄至5岁儿童有47,954名。据头7年半的随访,没有产生保护性效果,这一情况是本文研究的始因。英格兰曼彻斯特市圣玛丽医院(SMH)
Its effectiveness has not been universally acknowledged since the introduction of neonatal BCG vaccination in 1922. The Indian Medical Research Council and the World Health Organization have collaborated on a prospective study of BCG efficacy involving 260,000 people, of whom 47,954 are children aged from 1 month to 5 years. According to the first seven and a half years of follow-up, no protective effect was produced. This situation is the cause of this study. Manchester, England St. Mary’s Hospital (SMH)