Not surprising,  given the  US's track record in bio-warfare interest...and that some species of bats can be unaffected while carrying all kinds of deadly diseases... they have a Very Interesting immune system !
Here's  one of the  better balanced presentations of what is gaining more and more traction.  And perhaps if the Truth is ever uncovered... it could  be.... human stupiditiy and/or incompetence...  (
The US also had an  "escape"  from one of their facilities,  Fort Dix,  from memory ?...)  which would go partly towards explaining the  Beijing's  vehement denials.  - Orientals have a 
particular difficulty with   "Loss of Face"  with Dictatorships more prone, with the  Chines Communist Party being the stand-out example of both.
  And Denial & Lying always had been normal with  'Politicians'  of any race. [bigwhistle]
Virologists are LYING about the origins of coronavirus: Yes, the coronavirus contains gain-of-function gene sequences that were INSERTED into the virus – NaturalNews.com