Published October 15, 2016 Public health officials in the United States today recommend that infants in the U.S. receive four doses of an inactivated, injectable polio vaccine (IAV) using chicken egg embryos, dog kidney cells or insect cells for production.1 However, between 1961 and 1999, most American children swallowed five doses of live oral polio … Continue reading Oral Polio Vaccine Was Contaminated with Monkey Viruses by Barbara Loe Fisher