Avoid using elevator while onboard. wash hands often.
Do NOT touch your nose, before washing your hands.
Take shower EVERY DAY, wash hire befor gong to bed.
Get enough sleep.
Bring some over the counter flu medications with you when travel.
Have some covid test kits with you.
Bring a terrmoeter with you.
If you have flu symptoms, use test kits to test in your cabin. Do not report it to medical center, unless it become necessary. Because they will lock you up right away in a inside cabin.