就说明没保护作用.疫苗实际效果要看直接接触后感染情况,只是牵涉到伦理不能这么做.比较每阶段医生,护士感染数据,最真实.
就说明没保护作用.疫苗实际效果要看直接接触后感染情况,只是牵涉到伦理不能这么做.比较每阶段医生,护士感染数据,最真实.
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