New research indicates that the coronavirus began to circulate in the New York area by mid-February, weeks before the first confirmed case, and that it was brought to the region mainly by travelers from Europe, not Asia.
https://www.nytimes.com/2020/04/08/us/coronavirus-live-updates.html#link-1316a5b0
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发表于 2020-12-8 19:58:19
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