Cluster (epidemiology)

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A cluster refers to a grouping of health-related events that are related temporally and in proximity.1 Typically, when clusters are recognized, they are reported to public health departments in the local area. The 1854 cholera outbreak which occurred in London is a classical example of a cluster. If clusters are of sufficient size and importance, they may be re-evaluated as outbreaks.

See also


  1. ^ "Definition of Clusters", Case Studies in Environmental Medicine (CSEM), Agency for Toxic Substances and Disease Registry, U.S. Department of Health and Human Services

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