Dean for the National School of Tropical Medicine
Baylor College of Medicine
Houston, United States
Endowed Chair in Tropical Pediatrics
Texas Children's Hospital
Houston, Texas, United States
Departments of Pediatrics and Molecular Virology & Microbiology
Baylor College of Medicine
Houston, Texas, United States
U.S. Science Envoy
U.S. Department of State
Middle East and North Africa
Sabin Vaccine Institute
Washington, District of Columbia, United States
Institute President and Director of the Sabin Vaccine Institute Product Development Partnership
Fellow in Disease and Poverty
James A. Baker III Institute for Public Policy
Rice University
Houston, Texas, United States
Co-Editor in Chief
PLOS Neglected Tropical Diseases


M.D. from Weill Cornell Medical College
Ph.D. from The Rockefeller University
B.A. (magna cum laude) from Yale University

Professional Interests

  • Drug and Vaccine Delivery
  • Tropical Medicine


Human Hookworm Vaccine Initiative
Development of a vaccine for the more than 400 million people suffering from hookworm infection in the world today. Vaccine currently in phase 1 clinical trials in Brazil and Gabon.
Schistosomiasis Vaccine Initiative
Schistosomiasis afflicts over 200 million people around the globe and is the deadliest disease among the seven most prevalent NTDs, killing an estimated 280,000 people annually. Our vaccine is entering phase 1 clinical trials.
Chagas Disease and Leishmaniasis Vaccine Initiatives
A project for the selection and discovery of antigens appropriate to advance into the development process of new vaccines to combat Chagas disease (American trypanosomiasis) and leishmaniasis.
SARS Vaccine Development Program
A new vaccine to prevent severe acute respiratory syndrome (SARS). A prototype RBD219 N1 vaccine is entering scale-up process development
Multivalent Anthelmintic Vaccine Discovery Program
A panhelmintic vaccine to prevent ascariasis (roundworm) and trichuris (whipworm), soil-transmitted helminths afflicting hundreds of millions of people around the world.