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Over the past two decades, researchers have gained a great deal of insight into the risks surrounding concussions – some of which has led to sweeping policy changes.

This handout provides a brief summary of what researchers currently know and don’t know about chronic traumatic encephalopathy, or CTE. Research on CTE is growing, and more studies are needed to help answer many remaining questions. CDC will update this handout as more information on CTE becomes available.

All helmets are not created equal. Learn what to choose to prevent head injury.

If you suspect that someone has a concussion, you should take the following steps...

This toolkit teaches coaches, athletes, and parents how to play it safe.

Are sports organizations like FIFA taking concussions in sports seriously enough?

Why do some parents and coaches think it's okay to let 9-year-old kids get hit in the head over and over in football practices and games?

A concussion can occur without the person losing consciousness. This fact sheet provides information to athletes about preventing, recognizing and responding to a concussion.

CTE has been getting a lot of press — the subconcussive blows, the development of CTE — where do you think this all comes into concern for youth contact sports? Does it really start in these younger kids?

“I can’t get my head together. I think I’m going nuts.” So say some athletes who, as it turns out, have post-concussive syndrome.

"Only you can decide how important football is in your life," the doctor told the young player after he sustained a concussion with lingering symptoms.

Helmets do not prevent concussions. Recent research explains why.