We have two documented strains of this virus. The original strain or clade S-COV was manageable with a lower infection rate and complication rate. That strain morphed into L-COV on around 1/20/20 in Wuhan. Much more aggressive with more complications. They hope it burned out in Wuhan.
Now are we going to see more morphs ? Does Iran have L-COV ? Does Italy have a worse new strain ? Does Washington State have L-COV. Are newer strains or morphs going to be worse or weaker ?
My understanding of this is that the full range of mutations will happen. If they are too deadly they can’t spread too far—if they are too weak they don’t do anything.
The virus will probably be changing faster than we can track the changes—at least for a while.