WUHAN, China — Around 1 a.m. on Dec. 31, Lu Junqing woke to a phone call from his boss at a local disinfection company. Get a team together and head to the Huanan market, he was told: “Bring your best kit.”Mr. Lu knew the market, a sprawling maze of stalls near a railway station, but had no clue it was the suspected source of a mysterious illness spreading across this city, later identified as Covid-19.

Source: Wall Street Journal May 12, 2020 16:40 UTC