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
How the Riddler Got His Name Riddler. Meanwhile, Ivy is seen caring for a person: a very much alive Cobblepot, whom Ivy saved from the river a few weeks ago. Cobblepot then says he needs to kill someone. Bruce wakes up in a cell and discovers through a window that he is on a snowy mountain. In December 2016, it was announced that the fifteenth episode of the season will be titled "How the Riddler Got His Name" and was to be written by Megan Mostyn-Brown and directed by TJ Scott. It was also announced that the subtitle for the new episodes for the rest of