No. That said, IIRC, there was some paper claiming that there was some binding (the spikes?) that appeared to be more specific to human than to any of the animals suspected of passing to us. That's at least rather surprising, if you imagine this to be an entirely natural event. And it might support the idea that there was a lab step (accident?) somewhere along the way.

Ok, so we're determining that you can easily keep the conspiracy going, with relatively minor evidence.

I'm not a microbiologist, and it's unlikely that you are one either.

I wouldn't call it a conspiracy, and it doesn't really matter what the truth is. If a Chinese lab blew it, they're not going to fess up, and there's nothing we can do about it anyway, so it's pointless to get upset about it.

It's interesting to idly discuss, in an HN sort of way, but my advice is to ignore it and continue to live your life. Or at least move on to this week's outrage-fest.

The best would be to trace how it came about naturally. For instance with Sars 1 they "traced the virus through the intermediary of Asian palm civets to cave-dwelling horseshoe bats in Yunnan province." (Wikipedia)

The covid virus looks like a mix of bat and pangolin coronaviruses so it's possible that similar tracing will be done. People are no doubt trying.