I doubt this is true, simply because more cabin crew and flight deck officers would be taking time off as they are sick? How many flights do Southwest do each day? And how many times have they been off?
Exactly what is in this toxic air anyway?
I hope I am not breathing in toxic air, mainly as my children would be doing the same. But I have never been ill, nor have them... Nor has anyone I know who flys a lot.
Nikolai.