Hugh Gentry / AP Not so long ago, people in Hawaii who were diagnosed with leprosy were exiled to an isolated peninsula attached to one of the tiniest and least-populated islands. Details on the history of the colony—known as Kalaupapa—for leprosy patients are murky: Fewer than 1,000 of the tombstones than span across the village’s various cemeteries are marked, many of them having succumbed to weather damage or invasive vegetation.