<prompt> Endemic Disease means that a disease:Occurs clearly in excess of normal expectancyIs constantly present in a given population groupExhibits seasonal patternIs prevalent among animals  <response>: Endemic refers to the constant presence of a disease or infectious agent within a given geographic area or population group without impoation from outside. Ref: Parks Textbook Of Preventive And Social Medicine By K. Park, 19th Edition, Page 88; Parks Textbook Of Preventive And Social Medicine By K. Park, 18th Edition, Page 86 