So a good girlfriend of mine ,she does fashion PR, and so she'd worked with Leonardo DiCaprio and she said one of his travel tips for not getting sick. If you just put a little bit of Neosporin on a q-tip and you swab the inside of your nose before a long flight. Whether it's an urban myth or not I don't know, but I believe it to be true . It will create a moisture barrier in your nose because I'm you know you get so dehydrated on the plane and that's why you get sick, and it is also antibacterial.