My high school years were a procession of medical mission and Habitat for Humanity work groups. Two, three, even more, a year would come down. When I wasn’t working the makeshift pharmacy, stuffing bags full of medicine, giving children swigs of mebendezole, explaining the doctor’s instructions to patients and having them recite them back to me, I was translating for doctors, dentists, nurses, or house building crews. People came and went. A week of work, a day at the beach, and they were gone.