after 5 years of kidney transplant, we finally went for 1 month, after doing a lot of research and trying to cover all avenues of vulnerability, We just made sure you have meds for simple diarrhea or viral diarrhea. Also made sure that we drank bottled / boiled water through out the journey.. even brushed my teeth. Made sure that during a shower I did not gulp the water. Carried the BP/temperature measurement devices. Made sure had all the meds and carried and not checked into luggage. Bottom line you are most vulnerable to water & hygiene we stayed at places that had a kitchenette ( example Marriott Suites). I survived and am back home 10 days have passed so far so good, next week I will go for all the tests. On the flip side ..drank lot of fresh coconuts.. ate local fruits (bananas, oranges where the skin needed to be peeled). On the non conservative of side of life... we Snorkeled in deep ocean water.. no issues. Last thing I can think of is wear your mask when you find your self in crowded areas.
Have safe travels