Comment by Mark Honigsbaum

As a group of experts assigned by the World Health Organization to examine Covid’s origins pointed out in a study last month, most of the peer-reviewed scientific evidence supports the theory that SARS-CoV-2 originated in a natural bat reservoir from where it passed to animals that were being sold at a market in Wuhan. Unless and until evidence emerges to suggest otherwise, that remains the most parsimonious explanation.