Pro Football Hall of Famers are among those touting a new Flag Football Under 14 campaign, highlighting the risk of a degenerative brain disorder called chronic traumatic encephalopathy, or CTE . CTE is caused by repeated head trauma, and it can cause memory loss, aggression, and eventually, dementia. There’s currently no treatment or cure. The only sure prevention is to avoid repeated hits to the head, as in tackle football. Now, two different research groups have published work implicating a