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白喉是一种儿童易患的急性呼吸道传染病。我区少数县份有散在发生。为测知人群对白喉的免疫水平。我们于1975～1977年3～5月间在文昌、屯昌、定安和琼海四个县进行了4328例锡克氏试验观察,现报告如下。材料和方法毒素液、对照液来源:(1)北京生物制品研究所制品,批号:751～3(毒素液),
Diphtheria is a childhood-prone acute respiratory infection. A few counties in our district are scattered. To measure the population’s immunity to diphtheria. We conducted 4328 cases of Sikhs test in Wenchang, Tunchang, Dingan and Qionghai from March to May 1975 to 1977. The report is as follows. Materials and methods Toxin solution, control solution Source: (1) Beijing Institute of Biological Products, batch number: 751 ~ 3 (toxin solution),