Physician Photo

Edward Thomas (Ed) Ryan, MD

Director, Tropical and Geographic Medicine Center

Director, Travelers' Advice and Immunization Center

Edward T. Ryan, M.D. is the Director of Tropical Medicine at Massachusetts General Hospital. His focus area is global infectious diseases.

Infectious Diseases
Department of Medicine
Department of Pediatrics
Clinical Interests
Geographic and international medicine
Tropical medicine and travel medicine
Vaccines and immunizations
Infectious diseases
Boston: Massachusetts General Hospital
Medical Education
MD, Harvard Medical School
Residency, Massachusetts General Hospital
Fellowship, Massachusetts General Hospital
Board Certifications
Infectious Disease, American Board of Internal Medicine
Patient Age Group
Adult and pediatric
Accepting New Patients
Accepting New Patients

BiographyEdward T. Ryan, M.D. is the Director of Tropical Medicine, Massachusetts General Hospital, Boston, MA, Professor of Medicine, Harvard Medical School, and Professor of Immunology and Infectious Diseases, Harvard School of Public Health. Dr. Ryan received his Bachelor's degree in Biochemical Sciences from Princeton University, and a Doctorate in Medicine from Harvard University. He performed medical residency and fellowship training in infectious diseases at the Massachusetts General Hospital. Dr. Ryan received additional training in tropical medicine and infectious diseases at the London School of Hygiene & Tropical Medicine, was a Fellow in Human Rights & Medicine, Columbia University, and was an International Fellow, International Centre for Diarrhoeal Disease Research (ICDDR, B), Dhaka, Bangladesh.

Dr. Ryan has served on expert and advisory committees for the Institute of Medicine-National Academy of Sciences, U.S. Centers for Disease Control & Prevention, chaired the Clinical Research and Field Studies of Infectious Diseases Study section of the US NIH from 2006-2008, currently chairs the Standards and Treatment Guidelines Committee of the American Society of Tropical Medicine & Hygiene (ASTMH), and served as ASTMH President from 2009-2010. Dr. Ryan has been elected to Fellowship of the American College of Physicians and the Infectious Diseases Society of America, and has published over 150 peer-reviewed journal articles and book chapters on enteric infections, infectious diseases, vaccines, and tropical medicine. Dr. Ryan is a Senior Editor of Hunter's Tropical Medicine, 9th Edition.


Dr. Ryan's research focuses on clinical studies of illnesses associated with residing in, immigrating from, or traveling through resource-limited settings.  His research is funded by the U.S. National Institute of Allergy and Infectious Diseases (NIAID) and the U.S. Centers for Disease Control & Prevention (CDC).  Dr. Ryan is the principal investigator on research projects focusing on enteric vaccine development, host-pathogen studies on V. cholerae (the cause of cholera) and Salmonella enterica serovar Typhi (the cause of typhoid fever).  Particular areas of focus include the application of high throughput genomic, proteomic, immunoproteomic, and web-based platform technologies to these illnesses.  Dr. Ryan is also the Director of Global TravEpiNet, a CDC-sponsored national consortium focusing on global infectious diseases and evaluating vaccination strategies and use among global international travelers.  He is the principal investigator and program director for a Fogarty International Center, National Institutes of Health (NIH)-sponsored Training Program in Vaccine Development and Public Health between Harvard-MGH and the ICDDR,B in Dhaka, Bangladesh.  Dr. Ryan teaches tropical medicine and infectious diseases in the core curricula at Harvard Medical School and the Harvard School of Public Health, teaches students, residents and fellows at the MGH, and teaches in a number of post-graduate courses at Harvard Medical School and internationally.

Half of those travelling internationally not aware of potential health risks

International travel is the primary way many infections traverse the world. Despite these potential risks, a recent study conducted by the Division of Infectious Diseases found that 46 percent of travelers to resource-limited countries did not seek health advice or vaccinations prior to departure.

CDC, Mass. General study reveals that preventing malaria in travelers to West Africa reduces health costs

Not only do U.S. travelers to West Africa who consult health providers before they leave and take prescribed preventive medications substantially reduce their risk of contracting malaria, they also reduce costs to their health insurance providers and, in most cases, to themselves.

Infectious Disease Associates
55 Fruit Street
Boston, MA 02114-2696

Phone: 617-724-6454
Fax: 617-726-7653