I think that jet fuel should also be part of the discussion.
Here is a MSDS for Jet A:https://www.google.com/url?sa=t&source= ... VXinuTsnUS
Hazard Statements : H226: Flammable liquid and vapor.
H304: May be fatal if swallowed and enters airways.
H315: Causes skin irritation.
H336: May cause drowsiness or dizziness.
H351: Suspected of causing cancer.
H372: Causes damage to organs (Eyes, Blood) through
prolonged or repeated exposure.
Radiation exposure can and has been measured in the past.
Jet A exposure is difficult to measure. I make sure to cover my mouth everytime that I smell fuel vapors.
Radiation can't be remedied except by reducing hours flown by each crew. Jet A exposure can be reduced significantly by adapting start-up procedures. (see bottom of post)
I can also share a personal experience. When I worked in aircraft maintenance, I was often exposed to jet fuel. I once had my arms drenched in jet fuel and a few days later, a mole started forming on each of my arms and grew to about 8 mm. This was so sudden and fast that I had it checked by a dermatologist. Fortunately it was benign and they disappeared by themselves after a while.
While working in aircraft maintenance I developped IBS and chronic l intestinal ulcers which disappeared months after I called it quits.
The floor in the hangars are coverd with toxic products used in maintenance. It wouldn't surprise me that they contaminate the carpets in the cabins when maintenance workers walk in and out of aircraft several times a day.
So it's not just pilots and cabin crew. Maintenance workers are also heavily exposed.
Pilots should avoid starting the APU until doors are closed. AC packs should also be kept off for a while after starting engines, until the aircraft is clear of the fumes. That avoids the cabin becoming contaminated. AC packs are very often switched on immediately after engine start, unfortunately.