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IVS Core Faculty Biographies

Neal Halsey Larry Moulton Dan Salmon Kawsar Talaat  


Neal A. Halsey, MD


Dr. Halsey is a pediatrician with subspecialty training in infectious diseases and epidemiology. He has published more than 200 scientific articles in peer-reviewed journals on the subject of vaccines and vaccine safety and conducted or participated in epidemiological studies of vaccines against diseases including hepatitis A, hepatitis B, poliomyelitis, pertussis, Haemophilus influenzae type B, tetanus, Lyme disease, rotavirus, Argentina Hemorrhagic Fever, human papillomavirus (HPV) and influenza.

He has contributed information to the Institute of Medicine and the Public Health Service for reviews of individual vaccine safety issues, provided expert testimony and reviews of legal claims involving the National Vaccine Injury Compensation Program, vaccine manufacturers, and the Food and Drug Administration.

Dr. Halsey has served on advisory groups for the World Health Organization, CDC, and the American Academy of Pediatrics and he participated in the development of more than 90 guidelines for the use of vaccines.

Currently, he is a professor at the Johns Hopkins Bloomberg School of Public Health with a joint appointment in the Department of Pediatrics at the Johns Hopkins School of Medicine.

 updated September 2012



Lawrence H. Moulton, PhD


Dr. Moulton 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 and the Peace Corps Masters International program. 

 updated March 2010



Daniel A. Salmon, PhD


Dr. Salmon's training, research and practice interests are 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

DEPUTY DIRECTOR, Clinical Research

Dr. Talaat 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

This page was last updated on November 18, 2016

2016 Institute for Vaccine Safety