In both Yunnan and Laos, the only people who knowingly transported bat virus samples to Wuhan — and only to Wuhan — were scientists
Two years in, there is no doubt the Covid pandemic began in the Chinese city of Wuhan. But there is also little doubt that the bat carrying the progenitor of the virus lived somewhere else.
Central to the mystery of Covid’s origin is how a virus normally found in horseshoe bats in caves in the far south of China or southeast Asia turned up in a city a thousand miles north. New evidence suggests that part of the answer might lie in Laos.
