> It’s a debate in which legitimate scientific arguments vie for attention with partisan attacks and wild conspiracy theories. But so far, there is no smoking-gun evidence to definitively resolve whether COVID-19 spilled over naturally from animals at a market in Wuhan or whether it resulted from a laboratory accident in the city, where one of the world’s foremost coronavirus research facilities had amassed a vast repository of virus samples.

There’s literally no evidence that it spilled over naturally from animals in a market. That’s the wildest conspiracy theory, promoted by those who have a vested interest in it not having been a lab leak.