https://www.siliconvalley.com/2022/07/04/travel-troubleshooter-will-tripmate-cover-costs-for-trip-canceled-for-medical-reasons/

DEAR TRAVEL TROUBLESHOOTER: My wife and I planned to travel to Bonaire for scuba diving late last year. Before our departure, I went to the hospital with abnormal bleeding. My urologist told me not to travel, especially out of the country.

I canceled my plane tickets on Delta Air Lines and my reservations at Belmar Bonaire Oceanfront Apartments. Delta gave me credit for future use, which I have used, so no problem there.