A new study offers epidemiologic evidence
The story in the Atlantic is paywalled. Could you provide a link to the original paper?
If I recall correctly, there’s some evidence of SARS2 infection from the Lombardy region of Italy dating from about September 2019, in blood samples from a cancer study. Sorry I can’t provide the details! I’ve also heard stories of Americans who have positive SARS2 antibody tests some months after infections in November or December of 2019, so more anecdata (sorry). John Campbell suggests that a proper zoonotic spillover from bats would have resulted in animal SARS2 infections in many other parts of China, rather than just Wuhan. Evidence is piling up to support a lab leak, but I’m keeping an open mind (while not subscribing to the Atlantic).