George Siber, M.D.

Chief Scientific Officer, ClearPath Vaccines Company
Former Chief Scientific Officer, Wyeth Vaccines
Adjunct Professor of Medicine at Johns Hopkins Medical School

George Siber, M.D. has served as a member of our board of directors since 2007. Dr. Siber is an internationally recognized vaccine expert with decades of experience in developing innovative vaccines. Dr. Siber’s prior professional experiences include Executive Vice President and Chief Scientific Officer of Wyeth Vaccines Research, overseeing the development, approval and marketing of six innovative childhood vaccines including Prevenar 7, the first pneumococcal conjugate vaccine, Meningitec, the first Meningococcal C conjugate vaccine, Rotashield, the first rotavirus vaccine and FluMist, the first live nasal influenza vaccine. Prevenar 7 has dramatically reduced the burden of pneumococcal disease in the countries that have introduced it and has become the largest selling vaccine (more than $6 Billion per year). Previous to Wyeth, Dr. Siber served as Associate Professor of Medicine at Harvard Medical School and Director of the Massachusetts Biologic Laboratories. Under his leadership, the specific immune globulins to CMV (Cytogam) and to RSV (Respigam) the precursor product to Synagis were developed and licensed to MedImmune. Currently, Dr. Siber is Co-Founder and Director of Affinivax which is developing a 24V pneumococcal vaccine and a Klebsiella/Pseudomonas vaccine. Dr. Siber received his undergraduate degree at Bishop’s University in Lennoxville, Quebec and his medical degree from McGill University in Montreal. In 2016, The Sabin Vaccine Institute awarded the Albert B. Sabin Gold Medal Award to Dr. Siber for his outstanding contributions to immunology and infectious disease research through the development of life-saving vaccines for childhood diseases, including pneumococcus, Haemophilus influenzae type b (Hib) and meningococcus.