https://www.51yimindiy.com/bbs_forum/canada/canada_news/2021/1230/821229.html
未接種疫苗的人再次感染的可能性是接種疫苗的人10倍 在這文裏
https://www.51yimindiy.com/bbs_forum/canada/canada_news/2021/1230/821229.html
未接種疫苗的人再次感染的可能性是接種疫苗的人10倍 在這文裏
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