Dr. Prasanna Jagannathan is an Assistant Professor of Medicine in Infectious Diseases and of Microbiology and Immunology at Stanford University. His research focuses on the mechanisms of clinical immunity to malaria. He talks about how repeated exposure to malaria can lead to tolerance without symptoms, promising vaccines and treatments to prevent reinfection, and the role of innate immune cells. He also discusses shifting from religious studies to teaching to medicine, and establishing long-term collaborations with researchers in Uganda.