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Coronavirus quickly spread around the world starting late last y guiyingbian2020-05-06 14:02:18

guiyingbian2020-05-06 14:02:18

https://edition.cnn.com/2020/05/05/health/genetics-coronavirus-spread-study/index.html

(CNN)A new genetic analysis of the virus that causes Covid-19 taken from more than 7,600 patients around the world shows it has been circulating in people since late last year, and must have spread extremely quickly after the first infection.

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黄奇帆:中国经济受到的冲击和应对政策guiyingbian   2020-05-08 19:40:41Coronavirus quickly spread around the world starting late last yguiyingbian   2020-05-06 14:02:18