What parents need to know about football, concussions and head injuries

How much should parents worry about their sons playing football?

“I had a colleague who was talking about this with her son who wanted to play football. She had him shake an egg hard for a few seconds, and then they cracked it open to find the yolk broken. He decided not to play after that,” said Julie Stamm, a neuroscientist at University of Wisconsin-Madison. Stamm has spent years studying the link between football and chronic traumatic encephalopathy, or CTE, a disease caused by repeated head injuries.

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