When do you end this nonsense?

Up-voted. Leftists won't stop baaaaaing and taking the ordered jabs even when their brains begin leaking from their ear holes. Of course one doesn't pay much attention to what one never utilizes.

Serious question here...

If messenger RNA (mRNA) vaccines teach our cells how to make a protein that will trigger an immune response inside our bodies, why is there a need for a second shot, or a booster? Why does what the vaccine does, degrade over time, so that a booster is needed?

I actually tried to google this, but of course there are nothing but a bunch of puff pieces that come up, saying what a booster is relative to one of the first two jabs, etc., etc.

I figured those who are pro-vax should know info like this, which is why I'm asking.