Granzyme K Secreted by Aged T Cells Contributes to Cognitive Decline, an Effect that Can Be Reversed

The aging of the adaptive immune system, made up of B cells and T cells, is a complex process. Broadly, the pace at which new adaptive immune cells are created declines to a tiny fraction of youthful levels in most people by age 50, and this lack of replacements allows the adaptive immune system to...

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