论文部分内容阅读
从第一批疫苗接种日起,至今已有一年9个月。在此期间我们对前文(一)中各批疫苗所有接种儿进行了免疫性的追踪观察,现将其流行病学效果观察报告如下。
From the first vaccination date, it has been 9 months a year. During this period, we conducted an immunological follow-up survey on all vaccinations of each batch of vaccines in the preceding article (I). The epidemiological results of this study are reported below.