I wouldn't agree with the previous comment that we weren't told about booster shots early on. It was always brought up as a possibility, just as there are booster shots for every vaccine in existence today.

We were told it was ultra-effective at preventing covid. That was true for the dominant variants of the time, and it's still true if you get a booster. They couldn't predict the future.

Fwiw I'm not accusing you of being an anti-vaxer. I am accusing the previous commenter of being one.