What is the meaning of index case?

noun

  • The earliest documented case of a disease that is included in an epidemiological study. .
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). index case. Retrieved September 23, 2026, from http://smartdefine.org/index_case/definitions/1324578
ChicagoWordNet. 2010. "index case" http://smartdefine.org/index_case/definitions/1324578 (accessed September 23, 2026).
HarvardWordNet 2010, index case, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/index_case/definitions/1324578>.
MLAWordNet. "index case" 23 October 2010. Web. 23 September 2026. <http://smartdefine.org/index_case/definitions/1324578>