No one “right” list, but everyone needs a checklist to ensure systematic approach and to ensure that you don’t miss any key steps.

This order is CONCEPTUAL. The actual order varies with the disease (for example, for hep A outbreak, implement #9 control measure [immune globlulin to exposed persons] ASAP). Also, some steps may be done at the same time, especially #2 and #3, which often come before #1.