The vexing ‘lab leak’ theory on China and the coronavirus

We may never know. But the argument that it could have leaked out of the Wuhan Institute of Virology or a sister lab in Wuhan has become considerably stronger than it was a year ago, when the screaming was so loud that it drowned out serious discussion.

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I had been skeptical of the “lab leak” theory because animal spillover is such an obvious answer. Genetics has proven that almost every disease mankind has faced jumped from animals: bubonic plague from rodents, measles probably from cows, whooping cough maybe from dogs, and so on.

Also, the leak idea was just too conveniently conspiratorial.

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But the Occam’s Razor argument — what’s the likeliest explanation, animal or lab? — keeps shifting in the direction of the latter.