The CIA knew about this lab, they worked to cause the leak, maybe it was not done properly, the CIA people were not informed on the science, and they did not really know it would infect the entire world. There is a similar plot in the TV show "The Americans".
I don't believe this theory, but I'm guessing China could easily use this kind of narrative in disinformation campaigns.
My only worry is diplomatic tensions with china. I guess everybody is a little anxious now and wants peace.