ecdemic

endemic, endemical - of or relating to a disease (or anything resembling a disease) constantly present to greater or lesser extent in a particular locality; "diseases endemic to the tropics"; "endemic malaria"; "food shortages and starvation are endemic in certain parts of the world"

epidemic - (especially of medicine) of disease or anything resembling a disease; attacking or affecting many individuals in a community or a population simultaneously; "an epidemic outbreak of influenza"