We've traveled to PR for the last 4 x-mas vacations, stayed about 2 weeks each time. Within 48 hours, my sats go up 3-4% and I feel so much better. Never had any difficulty with meds, but I've always traveled with a reserve stock. My mom went last year with us when she had severe bronchitis and she went to a local health clinic and they were terrific, very competent, prescribed meds, no charge. I am very sensitive to molds and I havent had a problem in the condos that we've rented, even though some of them havent been super clean. We've always drunk the water and eaten local unprocessed food, never had a problem. And the snorkeling is amazing!!!!!!!!!