[LorenPechtel]

It always happens. Local authorities are more interested in not killing business and tourism than they are in preventing low-probability epidemics. Thus a cover-up by the locals is to be expected.

And of course the Chinese government restricts access--there's no way to prove a negative, thus no way to exonerate them. No matter what investigators are allowed to see there will always be the allegation that they aren't being allowed to see the important stuff.