河北省1989～1990年发生了脊髓灰质炎流行,现将有关流行病学资料分析如下。发病率、死亡率:全省1989年报告脊髓灰质炎161例,发病率为0.276/10~5;1990年报告152例,死亡3例,发病率为0.249/10~5,死亡率为0.005/10~5。4岁以下儿童占病例总数的96～98%。时间分布:1989年5月开始报告脊髓灰质炎,夏秋季呈现流行,进入冬春季仍持续发病,直至1990年春季在部份人群实施应急接种,才控制了1990年的流行季节高峰。地区分布:全省1989年有10个地、市的27 The epidemic of poliomyelitis occurred in Hebei Province from 1989 to 1990, and the relevant epidemiological data are analyzed as follows. Morbidity and mortality: The province reported 161 cases of poliomyelitis in 1989 with an incidence rate of 0.276 / 10-5. 152 cases were reported in 1990 and 3 died, with a morbidity of 0.249 / 10-5 and a mortality rate of 0.005 / Children under 10 to 5.4 years of age accounted for 96-98% of the total number of cases. Time Distribution: Polio was reported beginning in May 1989, prevalent in summer and autumn, and continued to enter the winter and spring. Until the emergency vaccination was carried out in some people in the spring of 1990, the peak season prevalence in 1990 was controlled. Regional distribution: the province has 10 places in 1989, the city of 27