On 6/17/2018 11:47 AM, Emanuel Berg wrote:

I think there is no doubt a helmet helps
against those injuries.

The data is clear that helmets are making a big difference.

"five well conducted case‐control studies and found that helmets provide
a 63–88% reduction in the risk of head, brain and severe brain injury
for all ages of bicyclists. Helmets were found to provide equal levels
of protection for crashes involving motor vehicles (69%) and crashes
from all other causes (68%). Furthermore, injuries to the upper and mid
facial areas were found to be reduced by 65%, although helmets did not
prevent lower facial injuries."