Pretty lame bioweapon given it kills then than half a percent naturally.

Extra lame for China to release it in China first, and for the impact to massively damage their own economy since they're so export focused.

I find this theory profoundly implausible for those reasons. You can say a lot of things about Xi, but he's no fool.

Accidental leak from a lab researching it is entirely plausible, but as a bioweapon it's ridiculously ineffective.