Special areas,for instance,some developed areas(Guangdong,Shanghai),or drug-spread area(Yunnan),or illegal hemo-collecting area(Henan) should have higer infectious rate.

 
  • 特殊地区,如经济发达地区(广东、上海),或者吸毒地区(云南),或者非法采血地区(河南)其比率应该高于平均值。
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