What is the most appropriate sequence of action in an outbreak investigation? ?? Groups 2 Establish a diagnosis, conduct a case control study, and initiate control measures. ? Determine whether an epidemic exists; characterize the epidemic by time, place, and person; establish the diagnosis; and initiate control measures. Calendar 3 Determine whether an epidemic exists; initiate control measures; characterize the epidemic by time, place, and person; and establish the diagnosis. 4 Establish the case definition; test hypotheses; characterize the epidemic by time, place, and person; and establish the diagnosis. Inbox 5 Establish the case definition; determine whether an epidemic exists; characterize the epidemic by time, place, and person; develop hypotheses regarding spread; and