"Sitting in the flight deck for many hours a day getting DVT,"
This might not be the place to ask this but this made me wonder - do pilots wear compression socks? Or are they pointless? Or do you just make sure you move around enough?
As for air quality, can't say I've ever noticed any weird smells or felt ill after flying, but have also been on a transatlantic 777 flight recently that was way too hot after the first meal. I thought it was just me, nice to know it's fairly common.