Back in the day shared this tip to avoid infections when traveling, topical bacitracin smeared inside your nose. It’s an antibiotic though so I doubt this is any use against viral infections. Still, handy tip.
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Saline solution on flights is good too. Your mucus is fly paper. If it dries out, nothing to catch germs.
So mask and saline solution in sinuses to keep moist
There is a WSJ article from 2011 about flying in the age of germs, and they recommended that even just using a moisturizing spray helps, bc dry tissue is much more susceptible.


