Endemicity of a disease means:: (A) Occurs clearly in excess of normal expectancy, (B) Is constantly present in a population, (C) Exhibits seasonal pattern, (D) Is prevalent among animals
Answer is B. Endemic Is the constant presence of a disease agent in a defined geographical area ; refers to 'usual or expected frequency' of a disease in a population. For instance, common cold is endemic because somebody always has one. Endemic diseases in India are : Measles, mumps, rubella, chicken pox, peussis, TB, HIV, Cancers, diabetes, hypeension etc. Epidemics can arise from uncontrolled endemics also.