There was no effect of age on CD107a expression (pertussis: R2 = 0.00491, p = 0.4089; pertussis + LCC: R2 = 0.00879, p = 0.272; Fig. 2F), which is consistent with maturation of the NK cell repertoire, and therefore decreased sensitivity to exogenous cytokines, but maintained cytotoxicity, during normal aging (reviewed in Ref. Here, LAMP1 is linked to pertussis.