Two leading epidemiologists explain why you'll be getting many COVID-19 boosters in the years ahead because that's how the vaccines work
Also see this excellent essay from @VirusesImmunity explaining the different parts of the immune system and *why* those boosters are necessary and beneficial. (Many childhood vaccines come in three/four doses—same idea).
Two leading epidemiologists explain why you'll be getting many COVID-19 boosters in the years ahead because that's how the vaccines work