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scientist looking at the data. i think that s also where some of this schism occurred, was between people who are looking at this big picture at the population level and people looking at the laboratory level. what you are saying is you see looking at the laboratory level you see boosted immunities and levels, so there s a case for this. if you are looking at the population level, you re looking at how long does it last and what s the efficacy of deploying a booster at scale, what does it get us? is that what you re saying? that s exactly right. are you relying on antibodies to really tell us what immunity is going to look like, and we know that, yes, with an infection or with a vaccination you see a spike in antibody levels, but those levels will wane. they will come down. if they did no, if you had high antibody levels to every single infection or vaccination you had in your lifetime, your blood would literally turn to sludge. so we rely on memory cells to

Laboratory levelPopulation levelAntibody levelsMemory cells