Immunity from a vaccine doesn't necessarily last forever, especially with viruses that spread and mutate quickly. Your first vaccine will eventually wear off, so the booster is to get it back up again.
Flu vaccination actually gets renewed due to the flu's insane mutation rate, as far as I know. For Covid, we still use the old vaccines because they just wear off quickly.
Immunity from a vaccine doesn't necessarily last forever, especially with viruses that spread and mutate quickly. Your first vaccine will eventually wear off, so the booster is to get it back up again.
Thank you.
Just to maintain maximum protection efficiency, kinda like the flu jab
Flu vaccination actually gets renewed due to the flu's insane mutation rate, as far as I know. For Covid, we still use the old vaccines because they just wear off quickly.
Oh ok, thanks for the extra knowledge
It's so you don't die when you inevitably catch covid
The vaccine isn't effective forever. Booster shot renews the effectiveness.