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The efficacy wanes, especially when the dominant variant changes to Omicron, but the efficacy for preventing severe infection (hospitalization/death) persists for much longer….possibly years.
Yep. The bolded is what I was referring to. Thanks!
My understanding:
Long after a vaccination, we may not have much - if any - active antibodies cursing around our system. But, our body still has memory to detect and attack re-infection by producing more antibodies.
One of the big problems with Covid is the virus was novel to us. By the time some of our bodies recognized we were under attack and figured-out how to fight the virus, it had already gained strong foothold establishing a high viral load.
Since we're no longer biologically naïve these days, either through vax or infection, our system more quickly recognizes the virus and more quickly rallies to our defense.
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Does my theory/understanding sound legit?
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