Methods Epidemiological observation and experiment of isolating virus through culture of human embryo kidney cell were used in this study.
方法用流行病学观察法进行监测。实验用人胚肾细胞培养方法分离病毒。
MethodsPopulation experiment was taken in two populations in Guangzhou by using field trial epidemiological method.
方法采用现场实验流行病学方法，对广州地区两个人群进行试验。
MethodsPopulation experiment was taken in two populations in Guangzhou by using field trial epidemiological method.
方法采用现场实验流行病学方法，对广州地区两个人群进行试验。
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