Solution #85: Do Helmets Increase Head Injuries?
The number of recorded head injuries increased, but the number of deaths
decreased. Previously, if a soldier had been hit on the head by a piece of
shrapnel, it would have pierced his cap and probably killed him. This would
have been recorded as a death, not a head injury. After helmets were issued
it was more likely that a fragment of shrapnel would cause an injury rather
than death. Thus, the incidence of head injuries increased, while the
incidence of deaths decreased.
Source: Sloane, Paul
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