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2. The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2
3. http://www.chinanews.com/m/34/2020/0318/1388/globalfeiyan.html
4. Omicron likely to weaken COVID vaccine protection
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https://epaper.chinadaily.com.cn/a/202112/09/WS61b13202a31019b029ba2661.html