I was reading an interesting article the other day of covid, can't remember where from, but it was how the virus developed from two sources, much in the way as it copies dna, it's path gets dislodged, but it does not need to recreate it from the beginning again, because it's remembered the previous code, hence you get sars-covid, as it completes the code on the secondary path. All a load of scientific bolloxs but it sounded convincing and completely dismissed the Chinese laboratory. How it's original source was bats....and one other half of the combo whose short name escapes me...
No good me being scientific i aint got a clue, but it sounded like they knew what they was talking about, more than you do aberdude