"Retrospective analyses of blood samples in China from people and animals—including vendors from other animal markets--may reveal a clear picture of where the 2019-nCoV originated."
https://www.sciencemag.org/news/2020/01/wuhan-seafood-market-may-not-be-source-novel-virus-spreading-globally
The New York Times:
"That allowed experts from around the world to quickly conclude that the new coronavirus, like the one from SARS, had very likely originated in bats and made the leap to humans through infection of another mammal in a market in Wuhan."
https://www.nytimes.com/2020/01/26/world/asia/china-coronavirus-xi-jinping.html?action=click&module=Top%20Stories&pgtype=Homepage
Pork, Pigs, and the Wuhan C... by rubiconmedia on Scribd