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
Tukiki and His Search for a Merry Christmas given gifts which he eventually takes back to give to his selfish arctic friends. The thoughtful giving of gifts brings about a change in Tukiki's homeland and suddenly harmony reigns where once was none, and through Tukiki's act of love, the true meaning of Christmas is discovered. 1980 Genie Awards: "Tukiki and His Search for a Merry Christmas" was released on VHS by Embassy Home Entertainment in 1986 which has long been out of print. On August 12, 2008, it was released as a manufacture-on-demand DVD-R as part of the "Holiday Classics" series by Phoenix Learning Group, Inc. Tukiki and