Increased skin cancer risk
 

Here's a link to a study showing a significant risk for aircrew. BALPA involved. I know we fly a lot at night but long sleeves anyone?

Air cabin crews have a greater risk of skin cancer - health - 04 September 2014 - New Scientist

Can you imagine what the dosage must be from flying over the poles!!!

Just think of the findings 20 years from now from pilots sitting in the flight deck for 92 hours per month, the airlines are pushing new boundaries with you lab rats!!

...and that's while currently taking into account of the Solar Flare forecasts when heading over the poles.

Just to clarify my comment above, it looks like the study may not have looked into Polar transits, which of course hold a much higher intensity and risk. On those trips Solar Flare forecasts are referenced at the planning stage.

A simple little article to explain:
http://www.avweb.com/news/aeromed/18...l?redirected=1

Further references:

http://www.swpc.noaa.gov/NOAAscales/...adiationStorms

http://www.denvernaturopathic.com/ne...ileflying.html