Regarding polio: I can strongly protect myself against future infections by getting polio or the vaccine. I'd prefer the vaccine. Regarding chickenpox: I can s

Regarding polio: I can strongly protect myself against future infections by getting polio or the vaccine. I'd prefer the vaccine. Regarding chickenpox: I can strongly protect myself against future infections by getting chickenpox or the vaccine. I got the vaccine, my friend got chickenpox. Regarding the flu: I can maybe protect myself against future infections for a short period of time by getting the flu or the shot. It's called a shot here because vaccine implies strong protection. Regarding covid: I can maybe protect myself against future infections for a short period of time by getting covid or the shot. I already had covid so I won't be getting the shot. Natural 'immunity' is totally legitimate and contributes to herd 'immunity' when it's realistic. Would I get the flu and covid shots if they somehow protected against all relevant mutations and could accomplish what the polio vaccine did? Yes, but only if we also give the shot to all the animals that may be vessels for mutation as well.