If the vaccines work so well, why do we need a third dose? Maybe because a lot of vaccines work that way?

“If the vaccines work so well, why do we need a third dose?”

Oh, I don’t know… Maybe because a lot of vaccines work that way? pic.twitter.com/FDMKaykSTh

— Chise 🧬🧫🦠💉🔜 MFF (@sailorrooscout) November 17, 2021