For example, according to the Department for Management of highway traffic safety national probability estimates for a nunhelmeted rider suffered a fatal head injury by 40% higher compared with a rider wearing a helmet. If we consider non-fatal head injury, a risk nunhelmeted rider higher accident Helmeted rider up to 40%. However, a report published by Dr. Jonathan Goldstein of Bowdoin College states, "It is concluded that the helmet does not significantly affect mortality probabilities and impacts more speed. Also , helmets also increase the severity of injuries in the neck ".
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