<prompt> Pandemic is defined as -Endemic in small populationEndemic in large populationEpidemic in small populationEpidemic is large population  <response>: Ans. is d i.e., Epidemic is large population Sporadic - Disease occurring irregularly from time to time. Endemic - Disease occurring regularly in expected frequency. Epidemic - Disease occurring in excess of expected frequency. Pandemic - Epidemic affecting a large proportion of the population over a wide geographic area. 