I read an article here a while back that said this particular Coronavirus had an intermediate segment that no other coronavirus had, and that this segment contained 4 additional amino acids that aided it in its infectious ability.
Bannon routinely has Steve Hatfield on his pandemic podcast- Hatfield being a retired Ft Detrick bioweapons expert. Hatfield hasn’t said anything along those lines so I’d be sceptical of it. It would be big news.
Covid is an RNA virus, they are very unstable, morph very easily.