So if Kathy and Joe are both vaccinated (with vaccines that are effective, widely available, and free) they are both immune. Let Joe return to normal if that's what he wants. If Kathy wants to triple mask for the next 25 years, she is free to do so. If Steve refuses to get vaccinated because of his choice, then gets infected, that is Steve's responsibility
Maybe if people stopped trying to gaslight, demean, or guilt others, rather than focusing on ways and incentives to get people vaccinated then we would be in a better place.