Its pretty funny that Mr and Mr America fall for this charade. They are told football is dangerous for "sons" while the same kooks are promoting girls into the game (and in combat). Real researchers haven't found any big links (and tau proteins are caused by many things and most people have evidence of them) and the "studies" cited in faux crisis articles were epitome of junk science. Just last month it came out that black gays are near a 50% HIV rate but Michael Sam is some kind of hero and the Mets are having a "Pride" day. Some how concussions have become more dangerous than celebrated behaviors practically guaranteed to get you a lethal virus. We live in an age of hucksters, weirdos and fools. NFL is increasingly run by all three.
Consensus Statement on Concussion in Sport
The 4th International Conference on Concussion in Sport Held in Zurich, November 2012
Chronic Traumatic Encephalopathy
Clinicians need to be mindful of the potential for long-term problems in the management of all athletes. However, it was agreed that chronic traumatic encephalopathy (CTE) represents a distinct tauopathy with an unknown incidence in athletic populations. It was further agreed that a cause and effect relationship has not as yet been demonstrated between CTE and concussions or exposure to contact sports.[105–114] At present, the interpretation of causation in the modern CTE case studies should proceed cautiously. It was also recognized that it is important to address the fears of parents/athletes from media pressure related to the possibility of CTE.
http://www.medscape.com/viewarticle/781420_3