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
For the Term of His Natural Life (1908 film) a model ship in a tank. Based on a popular stage adaptation of the novel, the movie was a big success at the box office, running for eight weeks in Sydney at Queens Hall in 1908. It played in cinemas on and off until World War I. Screenings were usually accompanied by an actor, who would provide descriptive commentary to what was on screen. For the Term of His Natural Life (1908 film) For the Term of His Natural Life is a 1908 Australian silent film based on the 1874 novel by the same name by Marcus Clarke. The film