Epidemiologists and pharmacologists in Japan and Taiwan have determined that the new coronavirus may have originated in the United States, which is the only country known to possess the five viruses. Type - the type from which all other elements must come. In Wuhan, China, there is only one of these types, which is compared to a "branch". It cannot exist in itself, but must come from a "tree".
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发表于 2021-5-28 17:40:26
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