Richard Skolnik, lecturer at Yale and author of Essentials of Global Health, devotes this session of the course to malaria as a case study in communicable disease control. He covers the biology of the parasite and its mosquito vector, the burden of disease it causes across sub-Saharan Africa and other endemic regions, and the populations most at risk, particularly young children and pregnant women. The lecture reviews determinants and risk factors, from standing water and housing conditions to health system access, and surveys interventions that have shown cost-effective results, including insecticide-treated bed nets, indoor spraying, and artemisinin-based combination therapies. Skolnik ties the malaria discussion back to the course's broader framework for analyzing disease burden and evaluating what has actually worked to reduce it, making this a compact model of the method applied throughout the series.