Let me put it this way. What do you gain if it does turn out that it was lax lab security that cause it? Nothing, all you get is more anti-Asian fuel for racist idiots. I mean you can't even sue them for causing this if it is indeed true since they are a sovereign power. All it would do would increase hate crimes against Asian people since racists generally can't tell the difference.
OK, so, I've had a few days to stew on this, even though I said I wouldn't contribute to this thread any more, but eh... things are slow at the moment (also leaving aside the fact that I didn't make any mention of 'gaining anything from being right' about a conspiracy theory I acknowledged as being an irrational outburst on my part).
The more I think about it, the less I'm worried about racist attacks in the west IN RELATION TO (i.e. not in absolute terms) racist reprisals in China, or just outright racist conduct in general (because racial discrimination in China is so par for the course it's barely commented on there, hence why it's barely commented on, if at all, abroad). I speak Chinese (two dialects at that), but with a very obvious accent. I can guarantee you that in the current climate, if I'm chatting with friends (anglophonic or sinophonic, we generally have enough cultural awareness to either swap languages regularly mid-conversation or concentrate on the local language) I can stroll down the road in any western city with very little fear of being accosted (leaving aside some people's weird belief that because I grow decent facial hair, I'm apparently more Japanese than Chinese).
However, if I do the same in any mainland Chinese city, dear god the dirty looks and comments I'd invite. I'm Huaqiao, which generates a bizarre mix of admiration and contempt at the best of times (because it makes me Chinese and not Chinese simultaneously and both in the worst possible way), but no matter what comes about of all this, Chinese nationals will be dripfed an anti-western narrative worse than it has been before, and I would genuinely fear for my safety in some corners if I lived in mainland China and people knew that I have a British passport, and ancestry/a wife from their two biggest territorial/diplomatic problems. So it's just as well I don't have an American passport and don't live in mainland China.
Consequently, any racist treatment I and Asian/Asian descended people get in the west will be little compared to the racist treatment foreigners get in China because I will have the protection of laws (or rather, people willing and able to uphold them) and sensible people, foreigners in China get none of the first and few of the second.
Anyway, to answer, your question directly: nothing whatsoever, and well do I know it. Not even vindication, because I've already had that a million times over.