The trial design was primarily to test disease protection, not i

But, the trial will provide information on viral infection( asymptic infection) at a later time by testing sera anti-COVID antibody positive rate between vaccine group and placebo group. 

 

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同意 -楊別青- 給 楊別青 發送悄悄話 楊別青 的博客首頁 (0 bytes) () 12/06/2020 postreply 17:49:46

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