Cases of the sexually transmitted bacterial infection syphilis are surging around the globe. In the U.S., Native Americans have the highest rates of syphilis than any other group. So much so, that the Indian Health Service is urging tribal leaders and health facilities that work with Native populations to institute a series of measures to fight the spread of the disease. We’ll explore why syphilis, that was once on decline, is making a dramatic comeback and what health officials are doing to fight it.