In 1978, the immunization program began in the country generally, only BCG, polio, measles, DPT vaccine 4 was included in the scope of immunity.

• 1978年,计划免疫工作开始在全国普遍实行时,只有卡介、脊灰、麻疹、百白破4种疫苗被列入免疫范围。