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  1. www.cdc.gov › surveillance › outbreak-case-definitionsOutbreak and Case Definitions | Unexplained Respiratory Disease...

    Key points. Developing a clear case definition is critical to effective investigation of an outbreak. The below content explains the difference between an outbreak and cluster and how to develop a case definition. Defining an outbreak of unexplained respiratory illness.

  2. blogs.cdc.gov › publichealthmatters › 2011Outbreak Investigation: A Cheat Sheet | Blogs | CDC

    Sep 7, 2011 · An outbreak, or epidemic, occurs when there are more cases of disease than would normally be expected in a specific time and place.

  3. archive.cdc.gov › www_cdc_gov › cselsPrinciples of Epidemiology | Lesson 1 - Section 11

    Outbreak carries the same definition of epidemic, but is often used for a more limited geographic area. Cluster refers to an aggregation of cases grouped in place and time that are suspected to be greater than the number expected, even though the expected number may not be known.

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  5. www.cdc.gov › nors › downloadsNATIONAL OUTBREAK REPORTING SYSTEM (NORS) GUIDANCE

    Definition of an Outbreak . For NORS reporting, the definition of an outbreak is two or more cases of similar illness associated with a common exposure. NORS is designed to capture all foodborne and waterborne outbreaks, certain fungal disease outbreaks, and enteric disease outbreaks spread by person-to-person contact, animal contact, environmental

  6. www.cdc.gov › outbreak-investigations-in-healthcareAbout Outbreak Investigations in Healthcare Settings - CDC

    Key points. CDC experts provide assistance to health departments and healthcare facilities to stop outbreaks and protect patients and healthcare workers. CDC uses what it learns while investigating outbreaks to devise strategies to prevent them from happening again. Overview.

  7. www.cdc.gov › scienceambassador › educationalInvestigating an Outbreak | CDC

    Print. Skill targeted: Decision-making. Launching an outbreak investigation requires planning and strategy. In public health epidemiologists and other public health experts use a series of steps to answer 3 key questions, “what is the problem?, what is the cause? and what can we do about it?”.

  8. en.wikipedia.org › wiki › Disease_outbreakDisease outbreak - Wikipedia

    In epidemiology, an outbreak is a sudden increase in occurrences of a disease when cases are in excess of normal expectancy for the location or season. It may affect a small and localized group or impact upon thousands of people across an entire continent.