IVS Core Faculty Biographies

Neal Halsey | Larry Moulton | Dan Salmon | Kawsar Talaat

Neal A. Halsey, MD, the Director of the Institute for Vaccine Safety, is a Professor in the Department of International Health at the Johns Hopkins Bloomberg School of Public Health and in the Department of Pediatrics in the School of Medicine. Dr. Halsey completed undergraduate and medical training at the University of Wisconsin, pediatrics and infectious diseases training at the University of Colorado, and he served in the Epidemic Intelligence Service at the Centers for Disease Control and Prevention(CDC) in Atlanta. After 5 years as a faculty member at Tulane University he has been at Johns Hopkins University since 1985. 

Dr. Halsey has authored more than 240 peer reviewed publications and 41 book chapters on the prevention and treatment of infectious diseases through vaccination, and participated in the development of more than 100 guidelines for the use of vaccines while serving on advisory groups for the WHO Expanded Programme on Immunization, the Advisory Committee for Immunization Practices (ACIP) for CDC, and the American Academy of Pediatrics Committee on Infectious Diseases. 

Dr Halsey has focused his research and teaching in recent years on vaccine safety. He is the Principal Investigator of the CDC funded Clinical Immunization Safety Assessment program at the Johns Hopkins Bloomberg School of Public Health.

updated April 2017


Lawrence H. Moulton, PhD, the Co-Director of IVS, is a biostatistician who focuses on issues of vaccine safety and effectiveness. He has made applied and theoretical contributions to the design and analysis of Phase II, III, and IV vaccine investigations. Dr. Moulton's areas of expertise include statistical epidemiology and cluster randomized trials. 

He has served as a consultant to the FDA, CDC, PAHO, and WHO on issues of vaccine evaluation, and has received substantial National Institutes of Health funding for statistical research on vaccine evaluation. He has been the principal statistician on many large vaccine, HIV, and nutritional intervention trials. Dr. Moulton is a professor in the Department of International Health with a joint appointment in the Department of Biostatistics at Johns Hopkins, where he directs the Ph.D. program in Global Disease Epidemiology and Control.

updated April 2017


Daniel A. Salmon, PhD, the Deputy Director of IVS, has training, research and practice interests in epidemiology and health policy. He has focused on post-licensure vaccine safety and the factors associated with parental decisions to vaccinate, or not vaccinate, their children. Dr. Salmon served as the Director of Vaccine Safety at the National Vaccine Program Office, where he was responsible for coordinating federal vaccine safety activities. Dr. Salmon has conducted a broad range of studies examining the safety of vaccines, the rates of vaccine refusal, the reasons why parents refuse vaccines, the impact of health care providers and local and state policies on vaccine refusal and the individual and community risks of unvaccinated children. Dr. Salmon is widely published in the medical literature.

updated Sept 2012


Kawsar R. Talaat, MD, the IVS Deputy Director, Clinical Research, is a physician, who is board certified in Internal Medicine, Pediatrics and Infectious Diseases. Her research interests are vaccine clinical trials as well as challenge studies. She has extensive experience in the design and conduct of Phase 1 and 2 clinical vaccine trials for new vaccines, and in the conduct of challenge studies. In addition to her work on novel vaccines, Dr. Talaat is interested in the safety of existing vaccines. She has been working with the Institute for Vaccine Safety for several years. A member of the CDC Clinical Immunization Safety Assessment group and clinical Deputy Director for the Institute for Vaccine safety, Dr. Talaat has served on several working groups looking at vaccine safety and has co-authored a WHO-sponsored systematic review of the safety of influenza vaccines in children.

Dr. Talaat is an Associate Scientist in the Department of International Health at the Johns Hopkins Bloomberg School of Public Health and has a joint appointment in the Johns Hopkins School of Medicine.

updated Nov 2016