New cabin crew recruits for Qantas can expect up to two years whereby they catch every cold and flu variety under the sun.
I've 20 years in the job and haven't had a cold for years [unofficially
]........
As for bleed air problems?
We have had a couple reported. One in particular where one of the pilots [may have been the engineer?] was incapacitated due to fumes in the cockpit.
Long term effects of low level exposure are another thing altogether????????