最新研究表明,冠状病毒已于2月中旬开始在纽约地区传播,这是首例确诊病例之前的几周,该病毒主要是由欧洲而不是亚洲的旅行者带到该地区的。
Studies Show N.Y. Outbreak Originated in Europe (Published 2020)
The C.D.C. outlined how essential employees can go back to work even if they have been exposed. Scientists warn that the virus might not fade in warm weather.
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