疫情開始時好像有這個印象,說疫苗開發至少需要兩年。
是不是所有疫苗都要經曆至少兩年的考驗才能被正式批準?
回答: 27 Experts Launch Citizen Petition Demanding FDA ‘Slow Down and
由 BiologistMom
於 2021-06-17 17:24:36
疫情開始時好像有這個印象,說疫苗開發至少需要兩年。
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