白喉是计划免疫工作重点控制的７种传染病之一。近年来，北海市儿童百白破疫苗免疫接种率在９８％以上。该市已连续２４年无白喉病例。为了解学龄前儿童白喉免疫水平，１９９６年５～１０月我们对学龄前儿童进行了锡克氏试验，现将结果报告如下。１材料与方法１．１调查对... Diphtheria is one of the seven infectious diseases under the control of the planned immunization program. In recent years, Beihai children Baitai broken vaccine immunization rate of 98%. The city has had no diphtheria cases for 24 consecutive years. In order to understand the level of diphtheria immunity in preschool children, we carried out the Sick’s test on preschool children from May to October 1996, and the results are reported below. 1 materials and methods 1.1 investigation of ...