Where Are We in Hunting for the Origin of Covid-19?: QuickTake

Scientists have yet to determine the origins of Covid-19, years after it touched off the worst pandemic in more than a century. The first human cases were tied to a fresh food market in the Chinese city of Wuhan, and possibly to wildlife sold there. A newanalysis this year highlighted the possibility that small mammals sold at the market, like raccoon dogs, acted as a vector. There are more politically charged theories, including that the virus accidentally escaped from a nearby research laboratory, a theory that has support from the FBI but not the full US intelligence community. Amid ...