The earliest known cases clustered around the Huanan market, and virus-positive samples tracked with stalls selling live mammals. The authors say the upstream events remain unknown. The debate is live on the show.
Receipt
Worobey M, et al. The Huanan Seafood Wholesale Market in Wuhan was the early epicenter of the COVID-19 pandemic. Science. 2022;377:951-959. doi:10.1126/science.abp8715
No figure redrawn for this paper. The key result is in the answer above, the citation links to the source.





