There is no way to completely avoid the coronavirus whilst interacting with other humans unless it's simply not prevalent in your area (e.g. Australia, NZ).
Pretty much everyone has failed. Football teams, film studios, politicians, the lot. It's like trying to catch the wind.
The way to eliminate it, if you want to, is to accept that it will infiltrate your group, slowly quarantine it out until there's none left, and then allow no-one into or out of the group.
I don't understand how an intelligent person couldn't simply derive this from first principles, it's been eleven months or so now.
Do they exist in a different world to the rest of us or what? Most people I know, unless they're barricaded inside, have pretty much accepted that they're going to get it, the last study I read indicated that 1 in 4 individuals in the UK have already been infected.