Ann McKee, director Boston University's center for research into the degenerative brain disease chronic traumatic encephalopathy speaks last November about the study of NFL football player Aaron Hernandez's brain, projected on a screen behind, in Boston. Researchers believe Hernandez suffered from CTE. (Steven Senne/AP)
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06:02Jan 18, 2018

Hits Affecting The Head — Even Ones Without Concussions — Cause CTE, BU Study Finds

Researchers say the study gives "the best evidence to date" that preventing all head hits, whether concussions occur or not, is the key to preventing the serious form of chronic brain damage often studied in athletes and veterans.

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