Novel coronavirus circulated undetected months before first COVID-19 cases in Wuhan, China: Study dates emergence to as early as October 2019; Simulations suggest in most cases zoonotic viruses die out naturally before causing a pandemic — ScienceDaily

Using molecular dating tools and epidemiological simulations, researchers estimate that the SARS-CoV-2 virus likely circulated undetected for two months before the first human cases of COVID-19 were described in Wuhan, China in late-December 2019.

Source: Novel coronavirus circulated undetected months before first COVID-19 cases in Wuhan, China: Study dates emergence to as early as October 2019; Simulations suggest in most cases zoonotic viruses die out naturally before causing a pandemic — ScienceDaily

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