An Epidemic investigation is a set of procedures used to identify the the infectious agent,responsible for the spread of a disease. The bellow steps outline the process of investigating an outbreak:

• Prepare for field work
• Establish the existence of an outbreak
• Verify the diagnosis
• Construct a working case definition
• Find cases systematically and record information
• Perform descriptive epidemiology
• Develop hypotheses
• Evaluate hypotheses epidemiologically
• As necessary, reconsider, refine, and re-evaluate hypotheses
• Compare and reconcile with laboratory and/or environmental studies
• Implement control and prevention measures
• Initiate or maintain surveillance
• Communicate findings