I can't remember what it was but there was a talk about some kind of tradeoff with thymus function and age that was supposed to explain its atrophy, something l

I can't remember what it was but there was a talk about some kind of tradeoff with thymus function and age that was supposed to explain its atrophy, something like pneumonia death vs auto immune or cancer or something? Edit: Wikipedia on it: https://en.wikipedia.org/wiki/Thymic_involution#Unknown_selective_pressures https://en.wikipedia.org/wiki/Thymic_involution#Unknown_sele...