Final answer:
Mark Schuller's work with displaced Haitians following the earthquake is an example of medical anthropology, a specialty that addresses health in conjunction with societal factors.
Step-by-step explanation:
Mark Schuller's work with displaced Haitians following the earthquake falls under a specialty known as medical anthropology. This field of study encompasses various facets of human health, including the conditions that impact access to healthcare, the spread of diseases, the cultural practices around healing, and the role of societal structures in shaping health outcomes. Schuller's engagement with the post-earthquake situation in Haiti is a typical example of how medical anthropologists apply their expertise to real-world humanitarian crises, examining the intricate weave of social, economic, and political factors that influence health disparities.