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Memory immunity refers to the phenomenon where prior exposure to a specific antigen leads to a faster and more robust immune response upon subsequent encounters. This is a cornerstone of adaptive immunity, the body's specific defense system that learns and remembers pathogens.
The primary mechanism behind memory immunity involves the generation of memory cells. After an initial infection
When the body encounters the antigen again, these memory cells are rapidly activated. Memory B cells quickly
This heightened and accelerated response is the basis of long-lasting immunity conferred by infections and vaccinations.