The leader of the Wuhan team went there with a team to collect samples and animals. In the early days of Covid, those samples were re-examined and it turned out that the genome of the Covid strain was very similar to the Covid 19 virus. So the conclusion was taken that those bats must have been the origin where Corona somehow started. Somehow nobody at that time thought much about the fact that those samples were kept in Wuhan, exactly where the outbreak started.
Bats have a very unusual immune system in that they can harbor viruses without the virus killing the bat or the bat killing the virus.
It's one of the things that makes them ferociously good incubators for a cross-species mammalian plague. The other things are that they fly (so can cover larger distances than most mammals) and have communal living (so can transmit to each other very readily).
Hence I didn't say we evolved from chimpanzees, even though it'd've suited the snow clone better