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Chronic traumatic encephalopathy (CTE) is a type of brain damage that has been found in 345 of 376 deceased former National Football League (NFL) players, according to a 2023 report by the Boston University CTE Center, which has led the effort to diagnose CTE cases.
Per- and polyfluoroalkyl substances (also PFAS, [1] PFASs, [2] and sometimes referred to as "forever chemicals" [3] [4]) are a group of synthetic organofluorine chemical compounds that have multiple fluorine atoms attached to an alkyl chain; there are 7 million such chemicals according to PubChem. [5]