see inside.

来源: 北美愚医 于 2021-06-27 21:50:40 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (581 bytes)
回答: 无症状新冠感染者安全/危险吗？ 由 北美愚医 于 2021-06-27 18:36:11

 The 2 links are different. the first one is the youtube, but it turned out to be a PDF file?  I copied it and pasted it in a new web, and it is a youtube file, you can see it. 

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