In 2004(!), this Australian video was published about contaminated cabin air and its devastating consequences for the health of both crew members and passengers.
In the meantime, 20 years have passed and we unfortunately have to conclude that in spite of all the effort made (a.o. by GCAQE), very little has changed in this dire situation.
Watch the video via this link and be amazed that after all those years this abuse continues to exists, as commercial interests apparently outweighs the health of all those people that regularly board a flight.