Watch Clip
Genetic evidence supports theory COVID originated in market
6m 14s
The debate over COVID-19's origin is focused on two theories, that humans were first infected by a wild animal or that the virus leaked from a lab. Scientists say the natural transmission theory has been strengthened by new genetic evidence from the market in Wuhan, China, where there was a big COVID outbreak in December 2019. John Yang discussed the report with Katherine Wu of The Atlantic.