In epidemic, 1st step is -
Investigation of an epidemic: Verification of diagnosis Confirmation of the existence of an epidemic Defining the population at risk Rapid search for all cases and their characteristics Data analysis Formulation of hypothesis Testing of hypothesis Evaluation of ecological factor Fuher investigation of population at risk Writing the repo Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 143
Verification of diagnosis
Isolation
Immunization
Notification
Epidemiology