`` In 2012 , one of the semi-professional players was hit by a blindsided block on a punt return and the second player was involved in a helmet-to-helmet collision , '' the report said . There are approximately 1,100,000 teens playing high school football . Fever , nausea , headache are some of the symptoms of concussion . NFL players receive an estimated 900 to 1,500 blows to the head each year . High schools are changing the rules and implementing safety programs .
There are approximately 1,100,000 teens playing high school football . Fever , nausea , headache are some of the symptoms of concussion . NFL players receive an estimated 900 to 1,500 blows to the head each year . High schools are changing the rules and implementing safety programs .