What are the facts that changed, in this lab leak story? As far as I'm aware, our knowledge of the real-world facts haven't changed -- we're still in a positio

What are the facts that changed, in this lab leak story? As far as I'm aware, our knowledge of the real-world facts haven't changed -- we're still in a position of great uncertainty. All that's changed is how various commentators are dealing with that uncertainty: they had been downplaying it, now they're acknowledging it.