My preferred hypothesis is currently that this event is related to some stuff the Chinese were trying out with their mandatory vaccination program.  Something went wrong (as opposed to a deliberate goal to achieve a particular outcome.)  As to whether it was incompetence on the part of the public health officials in China, or whether there was some sort of sabotage, either is possible.

If the above is on the right track, I would expect every political entity around the world to do use all of the powers at their disposal to cover it up.  This because the vaccine program is super important to TPTB.  All of them!

I would expect a cover-up would first try to blame a naturally evolved 'virus'.  If that didn't fly, I would expect the story to shift to a 'bio-weapon'.  I would expect China to 'fess up' to it being their 'research' and 'our bad' whether that is the reality of the situation or not.  This is somewhat more palatable to them politically than a hit to the confidence of their public health system, and it is vastly more palatable to other partners around the world.

An even better strategy would be for the Chinese to 'mildly resist' it being the 'Wuhan BL4 lab' in the face of 'obvious' evidence to that effect.  99.9% of people will take their 'resistance' as a sure sign that they have something to hide and are thus 'guilty'.  One way or another, expect all efforts to be made to completely bury their mandatory vaccination program which, at least according to some, shifted legally on exactly the day that the illness first popped up.