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Researchers, including scientists from the Centers for Disease Control and Prevention (CDC) and the American Red Cross, have found evidence that Covid-19 was present in the U.S. in December 2019, weeks earlier than previously thought and before even the first cases in Wuhan, China, had been publicly identified.
https://www.forbes.com/sites/roberthart/2020/12/01/study-suggests-covid-19-was-in-the-us-weeks-earlier-than-thought-before-first-public-cases-in-china/?sh=107479b74bf8
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