Incidence of motion sickness and ear/sinus blocks
I once read that the incidence of motion sickness among airline passengers is about 0.1%, although I'm not sure how motion sickness was defined for this statistic (maybe only counting cases where passengers actually vomit).
Anyway, I'm wondering what the actual incidence is of motion sickness (serious enough to cause vomiting or requiring some sort of treatment) and ear/sinus blocks among passengers. Does anyone have any numbers for these, or a pointer to some stats on them?
If a passenger does get violently ill from motion sickness, what can you do? And if someone develops a total ear or sinus block and is in excruciating pain, how do you handle it? It seems to me that there probably isn't a lot you can do, but maybe there are some measures that can be taken to help.