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.
from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/03/210318185328.htm
from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/03/210318185328.htm
Novel coronavirus circulated undetected months before first COVID-19 cases in Wuhan, China
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March 19, 2021
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