Method Immunization effect of 514 children after they had BCG inoculated for 3 months was examined using the PPD tests.
英
美
方法应用结核菌素纯蛋白衍生物(PPD)试验,对514名儿童进行卡介苗接种3个月后阳性率调查。
目录
查词历史
英 汉