For those with a mild or severe head injury, the examination when arriving at the Emergency Department is the same – a series of questions and followed by a CT scan. But a new blood test may change all that, in that it could separate those who need a scan from others who simply should just go home and rest.  
Dr. Bennet Omalu, a leading authority on concussion research, wrote in a recent op-ed in the New York Times that children should be banned from playing football, and other "high-impact contact sports," until they are educated enough to decide for themselves. But we wonder whether his proposal will actually protect kids, since they need more activity, not less.