Parents worry that brain injury risk has turned youth football into a game of 'Russian roulette'

Parents worry that brain injury risk has turned youth football into a game of 'Russian roulette'

Two moms whose late sons suffered from a degenerative brain condition associated with the type of head impacts common in collision sports are suing the biggest youth football league in the U.S. But one neurologist says there is still a lot scientists don't understand about brain injury in sport.

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