úøàä àú ùðé äâøôéí äùçåøéí áàîöò äòîåã:
http://www.helmets.org/general.htm
àéï ùí îñôøéí


"The review concluded that helmets reduce the risk of head injury by around 69% and death by around 42%."
îôä:
https://en.wikipedia.org/wiki/Motorcycle_helmet