Forget buying expensive products that promise to keep you healthy when you fly. This simple, but unglamorous trick, prevents me from getting sick every time.

Before I head to the airport, I put a generous amount of antibiotic ointment on a cotton swab and then coat the inside of my nose. It creates a barrier for the germs and keeps my nose from becoming dry and irritated while breathing the recycled air in the plane.

(Of course, I have no medical proof, but I never get sick after flying when I remember to do this.)