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Covid-19 appeared in the US before Wuhan, Chinese scientists claim in new research paper

22 Sep, 2021 Using mathematical models, a quartet of Chinese scientists has argued that the first case of Covid-19 appeared between April and November 2019 in the northeastern US, long before the outbreak in Wuhan, China. “The calculation results show that the COVID-19 epidemic in the United States has a high probability of beginning to spread around September 2019,” says the 14-page paper published on Wednesday at ChinaXiv, a repository operated by the National Science Library of the Chinese Academy of Sciences.…

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