Sarah Ehlers is a historian specializing in global history and the history of modern biomedicine. Her work focuses on infectious disease control in colonial and decolonizing Africa, on medical humanitarianism, on questions of entangled and transnational history and of environmental history. After receiving her PhD from Humboldt University Berlin, Germany, she started working toward a postdoctoral project on environmental disease control at the Centre for Medical Humanities, University of Leicester, UK. Her doctoral dissertation on colonial sleeping sickness campaigns, European identities, and modern medicine will soon be appearing in book form. Pharmaceutical Crossings, Sarah’s project at the Beckman Center, investigated chemotherapeutic research between Europe, Colonial Africa, and the United States during the 1920s and 1960s.