Scientists at Israel’s Weizmann Institute have uncovered how aging cells evade the immune system. The protein PD-L1 stops the immune system from recognizing and destroying aging (senescent / “zombie”) cells. Antibodies to PD-L1 reduced inflammation and numbers of senescent cells.
https://tps.co.il/articles/zombie-cells-exposed-new-research-could-transform-age-related-therapies/