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The new coronavirus infected people in the U.S. in mid-December 2019, a few weeks before it was officially identified in China and about a month earlier than public health authorities found the first U.S. case, according to [color=var(--color-blue)]a government study published Monday. The findings significantly strengthen evidence suggesting [color=var(--color-blue)]the virus was spreading around the world well before public health authorities and researchers became aware, upending initial thinking about how early and quickly it emerged.
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雷达卡
发表于 2021-4-20 02:02:17
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