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广东省１９９４年至今已连续６年未发现脊髓灰质炎（脊灰）野病毒引起的病例。为了解目前汕头市健康人群脊灰免疫状况，及时发现计划免疫工作中可能存在的问题，１９９９年汕头市卫生防疫站进行了健康人群脊髓灰质炎免疫状况调查，现将调查结果分析如下。１材料与方法１．１调
No cases of poliomyelitis (polio) wild-type virus have been found in Guangdong Province for six consecutive years since 1994. In order to understand the status quo of polio immunity in healthy population in Shantou at present and to find possible problems in the planned immunization work in 1999, the epidemic situation of poliomyelitis in healthy population was investigated in Shantou Municipal Health and Epidemic Prevention Station. The results of the survey are as follows. 1 materials and methods 1.1 transfer