epidemiology

1. The branch of medical science dealing with the transmission and control of disease (synset 106059555)
   associated with:

   • index case - the earliest documented case of a disease that is included in an epidemiological study
   • prevalence - (epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population
   is a type of: medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques

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