1. Prepare for field work - Research and Supplies, Official Arrangements, Safety Protocols, and Contacts
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1. Establish the Existence of an Outbreak - Consider Severity, Potential for Spread, Public Concern, and Availability of Resources
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1. Verify the Diagnosis - Verify Procedures and Eliminate Experimental Error (and Other Errors/Biases, for That Matter)
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1. Construct a Working Case Definition
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1. Find Cases Systematically and Record Information - Time: Tables, Epi Curves; Place: Geographical Extent of Disease & Spot Map; Identify By Demographic Information or Exposures to Risk Factor
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1. Describe and Orient the Data in Terms of **Person, Place, and Time** - Descriptive Epidemiology
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1. Develop Hypotheses (Agent/Host/Environment Triad) = Chain of Transmission
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1. Evaluate Hypotheses - Analytical Studies (MUST Have a Control Group)
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1. Refine Hypotheses if Necessary
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1. Compare and Reconcile with Laboratory and/or Environmental Studies
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1. Implement Control and Prevention Measures (ASAP!)
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1. Initiate or Maintain Surveillance - Monitor Implementation: Track New Cases, Check the Outbreak’s Spread Outside Targeted Area, Control and Change if Needed
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1. Communicate Findings - Reports, To Important People and Public