Summary

Nearly 75% of NFL players who died between 2008 and 2023 had chronic traumatic encephalopathy, or CTE , a new study led by Boston University researchers finds. CTE is a degenerative brain disease that is found in people who have suffered repeated blows to the head. It can only be definitively diagnosed after death. CTE has been discovered in football players as well as other athletes, first responders and military members.

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