７０年代以前，周口地区白喉平均年发病率达８／１０万以上，曾是河南省高发区之一。自广泛运用白喉类毒素免疫预防以后，才得到了一定控制，特别是自１９７８年实行有计划的预防接种以来，控制效果更为显著。１９８４年迄今，已连续１５年无白喉疫情。现将我区通过计划免... Before the 1970s, the average annual incidence of diphtheria in Zhoukou area reached 8 / 100,000 or more and was once one of the high incidence areas in Henan Province. Since the widespread use of diphtheria toxoid immunoprophylaxis, only some control has been achieved, especially since the planned vaccination in 1978, the control effect is more pronounced. Since 1984, there have been no diphtheria outbreaks for 15 consecutive years. Now my district through the plan free ...