the mortality rate during that pandemic was around 2.5 %. 美

 日常保洁服务     |      2021-04-07 21:26

And thirdly, Doctor Chan warned of a continued threat of pandemic [ pandemic ] influenza.

 the mortality rate during that pandemic was around 2.5 %. 美国流感大风行中灭亡率在2.5%右. 期刊摘选 
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