High school and college football deaths average about 3 per year

A recent report by KL Kucera et al give details on high school and college fatalities related to head and/or spinal injuries .

From 2004 through 2015 there were 28 deaths reported related to head or spinal injuries,24 in high school players and 4 in college. 1.1 million play high school football while there are 75,000 collegiate football players.

Four of the 22 high school players had suffered a concussion in the four weeks  preceding the fatal injury and in three cases the second impact syndrome was implicated .Running backs and linebackers were the two most common positions.The head down-head first position was frequently implicated.

 I wonder what  parents and grand parents of high school footballers think about the ambulances frequently parked off to the side of the playing field.