i lived in the third world much of my life. the idea of janitors selling bats for extra cash is 100% believable, though we will never really know the truth.
The idea that a BL4 lab technician screwed up a containment protocol in late September, and the Chinese bureaucracy tried to hide it until late December is 100% believable to me.
The "Chinese Apology" is a belligerent denial, in great detail, of everything that they just did. And the people who just did it, get fired. Or shot, depending on the severity of the problem.
The people who directly caused this problem are most likely dead now.