Did SARS-CoV-2 adapt to humans long before the index case?

Did SARS-CoV-2 adapt to humans long before the index case?

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By Dr. Tomislav Meštrović, MD, Ph.D.May 19 2020

A new study from Canada and the U.S. suggests that severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may have already been pre-adapted to human transmission when it emerged in late 2019, which means there may be lingering populations of progenitor SARS-CoV-2 adept for human transmission and coronavirus disease (COVID-19) re-emergence. The research is published on the preprint server bioRxiv* in May 2020.