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Vaccines and Herd Immunity

In this video Paul Andersen explains how immune individuals in a population give the entire group a herd immunity. Concepts of immunity, vaccines, basic reproduction number, and herd immunity threshold are discussed. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/transla... Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/trac... All of the images are licensed under creative commons and public domain licensing: “Caribou.” Wikipedia, the Free Encyclopedia, February 6, 2015. http://en.wikipedia.org/w/index.php?t.... “Elk.” Wikipedia, the Free Encyclopedia, February 6, 2015. http://en.wikipedia.org/w/index.php?t.... “Herd.” Wikipedia, the Free Encyclopedia, February 3, 2015. http://en.wikipedia.org/w/index.php?t.... McDaniel, U. S. Navy photo by Photographer’s Mate Airman Philip A. English: At Sea Aboard the Aircraft Carrier USS Abraham Lincoln (CVN 72) Oct. 19, 2002 -- Hospital Corpsman 3rd Class Thorin D. Mayba from Huntington Beach, Calif., Checks the Dosage for an Influenza Vaccine before Issuing It to One of the Ship’s Crew. Lincoln and Her Embarked Carrier Air Wing Fourteen (CVW-14) Are on a Scheduled Six Month Deployment Conducting Combat Missions in Support of Operation Enduring Freedom and Southern Watch. U.S. Navy Photo by Photographer’s Mate Airman Philip A. McDaniel. (RELEASED), October 19, 2002. This Image was released by the United States Navy with the ID 021019-N-9593M-007 (next). This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing for more information. বাংলা | Deutsch | English | español | euskara | فارسی | français | italiano | 日本語 | 한국어 | македонски | മലയാളം | Plattdüütsch | Nederlands | polski | português | Türkçe | 中文 | 中文（简体）‎ | +/−. http://commons.wikimedia.org/wiki/Fil.... Mtattrain. English: Interior of R42 4828 on the (J) Train., July 30, 2011. Own work. http://commons.wikimedia.org/wiki/Fil.... “Wildebeest.” Wikipedia, the Free Encyclopedia, February 7, 2015. http://en.wikipedia.org/w/index.php?t....