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
Chris Sabin Chris Sabin Joshua Harter (born February 4, 1982) better known by his ring name Chris Sabin, is an American professional wrestler. He is best known for his work in Total Nonstop Action Wrestling (TNA) and currently works most notably for Ring of Honor (ROH). After being trained by Scott D'Amore, Sabin debuted in 2000 for Border City Wrestling, and quickly began competing for numerous other independent promotions. In 2003, Sabin joined TNA, and quickly won the TNA X Division Championship, which he later unified with the WWA International Cruiserweight Championship. In 2004, he also wrestled for Ring of Honor. In