COVID-19 Origins

Did COVID-19 come from a virus that leaked out of a lab in China? For most of the pandemic, that idea was considered a wacky conspiracy theory. But now, eighteen prominent scientists are calling for a closer look at the possibility of a lab leak as the pandemic’s real origin. What changed? We go in-depth with Stephen Goldstein who is an evolutionary virologist at the University of Utah. (AP Photo/Ng Han Guan)