For example, while overproduction of TERT is linked to decreased aging, it is also linked to cancer risk88; while variants of PCSK9 are linked to decreased LDL and heart disease89, they are also linked to diabetes90 and low cognition91; while CCR5 variants are linked to decreased risks of cancer92, HIV93 and diseases of the heart94, liver95, and brain96, they also correspond to increased risks of various viruses like West Nile virus97; and while CTNNB1 overproduction is linked to radiation resistance98, it is also linked to increased cancer risk99. This evidence concerns the gene CCR5 and cancer.