![The Wuhan Institute of Virology is known for its advanced research on bat coronaviruses.](https://webcf.waybackmachine.org/web/20230320182706im_/https://static01.nyt.com/images/2023/03/19/multimedia/19lab-leak-01-kvbq/19lab-leak-01-kvbq-threeByTwoMediumAt2X.jpg)
Lab Leak or Not? How Politics Shaped the Battle Over Covid’s Origin
A lab leak was once dismissed by many as a conspiracy theory. But the idea is gaining traction, even as evidence builds that the virus emerged from a market.
By Sheryl Gay Stolberg and