Dr. Ashley St. John is an Associate Professor in the Programme in Emerging Infectious Diseases at Duke-NUS Medical School. She also holds appointments in the Department of Microbiology and Immunology, National University of Singapore, the Department of Pathology, Duke University and the SingHealth Duke-NUS Global Health Institute. In 2023, she received an Investigatorship award from the National Research Council of Singapore. Her research program focuses on viral immunology with emphasis on developing novel vaccination strategies, diagnostics, and therapeutics for infectious diseases. She also studies immune responses at the intersection of infectious and allergic diseases, particularly involving the role of mast cells.