How Big of a Problem Do You Think Concussions Are in Football?

With Super Bowl XLIX just around the corner, FRONTLINE is asking fans for their thoughts on the NFL's concussion problem. At least 123 players were sidelined by a head injury during the 2014 NFL season. So how big of a problem do you think concussions are for football, and how have they changed your views about the NFL? Share your thoughts below in our interactive poll. Embed this on your own site.
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