卡介苗能够有效地预防儿童时期各型结核病。能够降低结核病的发病率及儿童结核的死亡率。我们于1995、1996两年对徐州市部分小学467名(其中男238名,女229名,均接受过卡介苗初种)一年级新生进行了复种前结核菌素试验(PPD试验)。PPD采用北京天 BCG can effectively prevent all kinds of childhood tuberculosis. Can reduce the incidence of tuberculosis and childhood tuberculosis mortality. In 1995 and 1996, we conducted the first repeat tuberculin test (PPD test) on 467 freshmen (238 male and 229 female, all of whom had received BCG vaccine) in some primary schools in Xuzhou. PPD Beijing days