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) 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 is an adaptation of MacMahon's stage adaptation of the novel. It was the fourth Australian feature ever made and is considered a lost film. The 1908 film was the first screen adaptation of Clarke's novel, which was also later filmed in 1911, as a silent film known as "The Life of Rufus Dawes", 1927, again as a silent film, and the most expensive produced