Novel coronavirus likely was circulating in October 2019, U.S. researchers say – UPI.com (which means it could have begun to circulate globally in November/December 2019)

“Our results define the period between mid-October and mid-November 2019 as the plausible interval when the first case of SARS-CoV-2 emerged in Hubei province,” it added.

A molecular clock is a method that determines the mutation rate of genes to deduce when two or more life forms diverge, according to UC San Diego. In the case of the coronavirus, the common ancestor of all SARS-CoV-2 variants had appeared by November, the report said.

Source: Novel coronavirus likely was circulating in October 2019, U.S. researchers say – UPI.com