I travel for a living (flight attendant) and usually to countries no one really wants to ever go to. I have been on planes and in airports for up to 38 hours straight. I don't always wash my hands before I eat and I don't always use hand sanitizer. I touch my face constantly during flights and eat local food from roadside stands. I don't take vitamins or probiotics and I'm stuck eating crappy airline food for days on end. I've been through horrible turbulence and had bumpy flights. I've been doing this for years and years and I have NEVER vomited. I have had stomach issues but I can count on one hand how many times that has happened (except for alcohol related...oops).

People DO get sick on planes but it IS rare. Sometimes its alcohol related and sometimes not. But please know it doesn't happen all the time.

My point is I've realized over the years that just the anxiety and the worry about what could happen is way worse than anything else. And the times I did worry nothing ever really happened. I do prepare myself anyways....like other posters mentioned I carry sanitizer and Pepto and Nauzene and Immodium and Bonine. Don't use those very often but I do have them on hand.

Go have an amazing time and try not to let emet ruin your trip!