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
John B. Robbins John B. Robbins John Bennett Robbins (born December 1, 1932) is a senior investigator at the National Institutes of Health, best known for his development of the vaccine against bacterial meningitis (Haemophilus influenzae type B (Hib)) with his colleague Rachel Schneerson. Bacterial meningitis is the leading cause of acquired mental retardation in children. Robbins is a recipient of the 1996 Albert Lasker Award for Clinical Medical Research, the Pasteur Award from the World Health Organization and the Albert B. Sabin Gold Medal in 2001 which he received for playing a major role in the development of Hib conjugate vaccine that