This is the real deal. According to ALPA - the events are happening in all aircraft types, all airlines - yes, including regional airlines. From what I recall - oil is entering into the environmentals. Yes NK has been addressing the issue. One incident - crew members (including FA's) were hospitalized after a severe event. The FO on this particular flight has been spear heading the effort. He mentioned, after the event, he and the FA's had been hospitalized for several days - feeling completely "out of it." The Captain died shortly after - may have been due to an unrelated issue.

I know this sounds extraordinary, I'm only sharing what I've heard from the FO who experienced this severe event.

Many airlines have expressed concern because crew have experienced it. I've experienced it several times. Wet socks odor during the descent in an A319. It was temporary and I don't recall the exact physiological reaction, only a head ache (may not have been as severe as other incidents). I only share this with you - so that you are aware.