Just one concussion can increase your risk of developing Parkinson's, researchers warn

The long-term effects of concussions and other brain trauma has been a big focus in recent years thanks in large part to the NFL and many of its former players. The league has been forced to address concerns that it doesn't do enough to prevent concussions and sideline players who are suspected of sustaining them, but there's still a long way to go. Now, new research suggests that just one concussion can be enough to increase the risk of developing Parkinson's disease later in life. The research...