AND....

Thompson et. al, 2009 Thompson DC, Rivara F, Thompson R., 2009. Helmets for preventing head and facial injuries in bicyclists(Review)

PLAIN LANGUAGE SUMMARY

Wearing a helmet dramatically reduces the risk of head and facial injuries for bicyclists involved in a crash, even if it involves a motor vehicle. [emphasis theirs]

Cycling is a healthy and popular activity for people of all ages. Crashes involving bicyclists are, however, common and often involve motor vehicles. Head injuries are responsible for around three-quarters of deaths among bicyclists involved in crashes. Facial injuries are also common. The review found that wearing a helmet reduced the risk of head or brain injury by approximately two-thirds or more, regardless of whether the crash involved a motor vehicle. [emphasis mine] Injuries to the mid and upper face were also markedly reduced, although helmets did not prevent lower facial injuries.

-mr. bill