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
Albert Joyce Riker a retired microbiologist from the University of Arizona. He died in Tucson, Arizona. Albert Joyce Riker Dr. Albert Joyce Riker (April 3, 1894 – February 21, 1982) was a noted American plant pathologist and professor at the University of Wisconsin–Madison. Riker was born in Wheeling, West Virginia, the son of Albert Birdsall and Mary Edith (Davis) Riker. He graduated from high school in Moundsville, West Virginia, after which he worked for the Royal Three Barrel Gun Company, was an automobile repairman and salesman, and helped build greenhouses. He then attended Oberlin College, receiving in 1917 his A.B. degree in botany.