1. Dont touch your eyes, nose or mouth.
2. Bring a travel size bottle of hand sanitizer and use it after youve washed your hands in the aircraft lavatory.
3. Stay hydrated. Bottled water is horrible for the environment, but this is one instance when youre allowed to drink it guilt free.
4. Order your drinks without ice the water onboard is teeming with bacteria.
5. Get up and walk around once an hour. Humans werent meant to stay in a sitting position for so long.