The toxins that come through the bleed air system, on all aircraft, have added toxic lubricants that poison airline passengers and crew members. When a passenger gets off of the plane after a trip, flu symptoms might be some of the minor effects. Brain injury, neurotoxicity could be some symptoms. A major cover-up by big business and governments. Solutions are :
1). Test the cabin air filters, or the air we breathe on commercial airliners. Monitor the air by testing it for toxic fumes.
2). Take the toxins out of the lubricants, so passengers and crew (pilots and flight crew) are not breathing poisonous fumes.
http://ashsd.afacwa.org/docs/genganda.pd for the latest updates