For each variant we've given an alphabet to, like Delta, there are variants occurring from those - they seem to only give them a letter once it's a large enough

For each variant we've given an alphabet to, like Delta, there are variants occurring from those - they seem to only give them a letter once it's a large enough step in mutation; I'm not sure of the actual labeling practices used. But yes, I'm not qualified for the pinnacle of such a debate either, but those discussions aren't even happening - at least not in public which they need to be. There are mutations that are occurring however just in vaccinated, that aren't occurring in the non-vaccinated, the virus mutating to escape the immunity of the vaccinations - which then makes those variants easier to spread to other vaccinated [and potentially easier to spread to unvaccinated as well]; UCSF recently released study of 1,300+ patients with COVID,78% had specific variants associated with vaccinated vs. 48% of unvaccinated having those same variants - various conclusions of possibilities could be made from that.