In addition to the other suggestions I brought these on a TA cruise in April, where several of our group did get Covid, but extra first aid is good for all the other illnesses on ships. I put these items in my 9 x6x4 clear zipper bag: a small first aid kit with the usual items mentioned above, Ayr no drip saline spray, Ayr saline nasal gel, systayne eye drops, TheraZinc lozenges and Zicam Nasal all-clear swabs. Several small travel kleenex packs (extra soft for constant sneezing and so forth). Baby wipes, Tums, pepto bismol, Immodium, Blue nitrile gloves, and because there were lots of reported toilet issues in quarantined rooms getting no service, I brought zip lock bags and a few scrub brushes to toss after use, and which I was very happy not to use, but glad I had. Now that bag is ready to go in case of fire, earthquakes, hurricanes or killer bee attacks, also in case of quarantine, 2 of all shared toiletries, lotions, toothpaste, device chargers, etc