<prompt> In epidemic, 1st step is?Verification of diagnosisIsolationImmunizationNotification  <response>: The steps in epidemic investigation are :Verification of diagnosisConfirmation of the existence of epidemicDefining the population at riskObtaining a map of the areaCounting the populationRapid search for all cases their characteristicsMedical surveyEpidemiological case sheetSearching for more casesData analysisFormulation of hypothesisEvaluation of ecological factorsFurther investigation of population at riskWriting the report 