“We don’t do politics,” a doctor at Cuba’s National Institute of Oncology said. “We just want to provide assistance to the population.” That was in 2024, during a research trip to Cuba in which we conducted interviews with weary, crestfallen doctors who explained how U.S. sanctions had made their job virtually impossible. They could not import crucial surgical supplies or replacement parts for radiotherapy machines, and they lacked the resources needed to treat large numbers of cancer patients.