Packing essentials you need to stay healthy when you travel

I used to travel so much that I kept a “go bag” of my essentials that never changed. I just threw it in my suitcase each time I packed. I had a minimal travel medical kit. But getting (very) sick overseas has changed the way I pack now. My new travel packing list includes some just-in-case and must-haves, you know, just in case I need those creature comforts of home.