Alyssa R. Letourneau, MD, MPH received an Sc.B. in neuroscience from Brown University and an M.D. from Yale University School of Medicine. She subsequently completed her residency in internal medicine and pediatrics at Massachusetts General Hospital and a fellowship in infectious diseases at Massachusetts General Hospital and Brigham & Women's Hospital. During her training, she received the Edward Kass Award for Clinical Excellence from the Massachusetts Infectious Disease Society and she completed her Master of Public Health at Harvard School of Public Health. She completed an additional year of clinical training in caring for immunocompromised hosts at Brigham & Women's Hospital and the Dana-Farber Cancer Institute.

Dr. Letourneau is the Director of the Massachusetts General Hospital Antimicrobial Stewardship Program and cares for patients both inpatient and in the clinic. Her clinical interest is seeing immunocompromised hosts including patients with leukemia, lymphoma, those who have undergone stem cell transplant as well as patients who will undergo immune modulating therapy.

In 2015, Dr. Letourneau was awarded the Morton N. Swartz Transformative Scholar Award from the Massachusetts General Hospital Division of Infectious Diseases to study respiratory syncytial virus (RSV) in immunocompromised hosts.