>It's almost like the existence of vaccines places evolutionary pressure on a mutating virus. All the major variants of concerns came into being in countries w

>It's almost like the existence of vaccines places evolutionary pressure on a mutating virus. All the major variants of concerns came into being in countries with very little vaccination. Delta started in India for example. Most viruses have a very hard time mutating to evade vaccines, since that requires evading the human immune system (with the exception of influenza which is very good at creating new strains which avoid immunity - vaccine or no vaccine).