NCIt definition : The constant presence of a disease or infectious agent within a given geographic area
or population group; may also refer to the usual prevalence of a given disease within
such area or group. (A dictionary of epidemiology, edited for the International Epidemiological
Association by John M. Last, Oxford University Press 2001);
Alternative definition : CDISC-GLOSS: The constant presence of a disease or infectious agent within a given
geographic area or population group; may also refer to the usual prevalence of a given
disease within such area or group. [A dictionary of epidemiology, edited for the International
Epidemiological Association by John M. Last, Oxford University Press 2001];