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
His Majesty, the American His Majesty, the American His Majesty, the American is a 1919 American comedy film directed by Joseph Henabery and starring Douglas Fairbanks. It was the first film released by United Artists. Several copies of the film exist in archives and collections. As described in a film magazine, Bill (Fairbanks), whose hair raising antics have made him the talk of New York City, decides to leave the metropolis after a new district attorney starts cracking down on minor offenses, and visits Mexico in search of adventure. He receives a telegram for a foreign country asking him to come at once to