The need for additional rounds of mass oral polio vaccine (OPV) immunization will be based on an ongoing evaluation of epidemiological and laboratory data.
是否有必要进行更多轮次的口服脊髓灰质炎疫苗大规模免疫接种活动，将以正在进行的流行病学和实验室数据评估情况作为根据。
Public health emergencies; the epidemiological feature; evaluation; influencing factors.
突发公共卫生事件；流行病学特点；评价；影响因素。
Method Descriptive epidemiological methods and medical statistics were used for statistics, analysis and evaluation.
方法运用流行病学调查方法，按照医学统计方法进行统计、分析与评价。
Method Descriptive epidemiological methods and medical statistics were used for statistics, analysis and evaluation.
方法运用流行病学调查方法，按照医学统计方法进行统计、分析与评价。
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