Originally Posted by Alan K

There is more to it then just that simple… for starters, the type of high speed accidents on motorcycles that cause massive trauma leading to instant or delayed death, are not helped by the presence or absence of helmet. Human body is quite frail and at high speed accidents, helmet only serves as a brain bucket… saving some effort for the cleaning crew. The accidents where life-saving differences are made by the use of helmet are relatively low speed accidents, which are far more numerous in number. And this why effect of helmets on donor organ count. High speed accidents can often do, damage internal organs to the degree that they are not useable.