Polio vaccine is usually provided in vials containing 10–20 doses of vaccine. A single dose of oral polio vaccine (usually two drops) contains 1,000,000 infectious units of Sabin 1 (effective against PV1), 100,000 infectious units of the Sabin 2 strain, and 600,000 infectious units of Sabin 3. The vaccine contains small traces of antibiotics—neomycin and streptomycin—but does not contain preservatives. In a generic sense, vaccination works by priming the immune system with an 'immunogen'. Stimulating immune response, by use of an infectious agent, is known as immunization. The development of immunity to polio efficiently blocks person-to-person transmission of wild poliovirus, thereby protecting
Americans for Medical Progress issues the Albert. B. Sabin Hero of Science Award to honor leading medical scientists and advocates of biomedical research. Past recipients have included Dr. Sabin himself, Nobel laureate Joseph E. Murray, vaccine designer Maurice Hilleman, and herceptin developer Dennis Slamon, as well as opera legend Beverly Sills, actress Barbara Barrie, and former U. S. Representatives John E. Porter and Patricia Schroeder for their support and advocacy of medical research. In Spring 2008 the organization awarded Tom Holder, the spokesman for Pro-Test, the Michael D. Hayre fellowship in public outreach. This allowed Holder to move to the United States, and with