With genetic samples from the infamous Wuhan market, a new study makes the case that raccoon dogs are likely the animal that infected humans. Proponents of the lab leak theory are dubious.

After an in-depth analysis of the genetic material from hundreds of swabs taken from the walls, floors, machines and drains inside the Huanan Seafood Wholesale Market in Wuhan, China — a site that’s been described as an epicenter of early spread of Covid-19 — scientists say they now know exactly which species of animals were in the same area where investigators also found the most positive samples the virus that causes Covid-19.

Samples taken in the pandemic's early weeks reinforce hypothesis that coronavirus emerged from live animal market, not a laboratory, new study says.