Barbarella wrote:
Viruses evolve over time, so you'll be protected with your vaccine, but as new strains evolve, we get boosters to boost immunity - that's why flu shots each year are based on whatever strain of the virus is most prevalent at the time, so with each booster, you're building antibodies to more strains of the virus.
I would presume that's how the covid vaccine will be over time.
Flu vaccines were once new, as well.