In epidemiology, the term hyperendemic disease is used to refer to a disease which is constantly and persistently present in a population at a high rate of incidence and/or prevalence (occurrence) and which equally affects (i.e. which is equally endemic in) all age groups of that population.[1][2][3][4] It is one of the various degrees of endemicity (i.e. degrees of transmission of an infectious disease).
^Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health (7th ed.), Saunders, 2003
^Principles of Epidemiology in Public Health Practice (3rd ed.), U.S. Department of Health and Human Services and Centers for Disease Control and Prevention (CDC), 2006, p. 72
^Miquel Porta; John M. Last, eds. (2018), A Dictionary of Public Health (2nd ed.), Oxford University Press
^Miquel Porta, ed. (2016), A Dictionary of Epidemiology (6th ed.), Oxford University Press, p. 46-47