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        Norovirus
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April 24, 2024
January 13, 2025
  Norovirus Reporting and Surveillance
          Key points
            * CDC reporting systems for norovirus include NORS, CaliciNet, NoroSTAT, NREVSS, and NREVSS Enhanced.
            * CDC uses surveillance systems (NVSN, SUPERNOVA, and NoroSurv) to generate estimates of norovirus illness and monitor trends.
            * CDC uses surveillance systems (NVSN and NoroSurv) to generate estimates of norovirus illness and monitor trends.
            * To report a norovirus outbreak, contact your state or local health department.
        Reporting
        Currently, state, local, and territorial health departments are not required to report individual cases of norovirus illness to CDC. We may not know about many cases because people may not seek healthcare for their illness; and most hospitals and doctor's offices do not generally test for norovirus.
        Healthcare providers should report all outbreaks of acute gastroenteritis, including suspected outbreaks of norovirus, to the appropriate state, local, or territorial health department.
        Health departments are encouraged to report all suspected and confirmed norovirus outbreaks through the National Outbreak Reporting System (NORS) and CaliciNet.
        CDC Reporting Systems
        CDC reporting systems
        CDC has several reporting systems for norovirus:
          * NORS
          * CaliciNet
          * NoroSTAT
          * NREVSS and NREVSS Enhanced
          Keep Reading: Compare CDC Systems for Reporting Norovirus
        Surveillance Systems
        Surveillance systems
        In addition to collecting norovirus outbreak data from state and local health departments, CDC uses the following platforms to generate estimates of norovirus illness and monitor trends over time.
        NVSN: New Vaccine Surveillance Network (NVSN) includes study sites that conduct active, population-based surveillance for hospitalizations and outpatient visits associated with acute gastroenteritis in children, as well as surveillance for acute respiratory illness.
        SUPERNOVA: The Surveillance Platform for Enteric and Respiratory Infectious Organisms at the VA (SUPERNOVA) is a network of five Veterans Affairs Medical Centers (VAMCs) in the United States that conduct active and passive surveillance for acute gastroenteritis, with laboratory-confirmed testing of various pathogens, including norovirus. SUPERNOVA is an endemic disease surveillance system that provides data to estimate the prevalence and incidence of norovirus in adults. Ongoing surveillance using this platform will allow for characterization of the pathogen distribution and serologic response over time.
        NoroSurv: NoroSurv is a global pediatric norovirus strain surveillance network. The aim of the network is to collect data on the circulating norovirus genotypes in hospitalized children under 5 years of age across different countries and continents. NoroSurv uses the most recent dual [polymerase (P) and capsid (C)] typing nomenclature for norovirus strains. Participating laboratories use standardized protocols for norovirus dual typing to generate P and C types.
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          Related PagesCaliciNet
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            * CDC Systems for Reporting Norovirus
            * CaliciNet
            * CaliciNet Data
            * NoroSTAT
        * 
            * NoroSTAT Data
        * NoroSTAT Data Table
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    CDC Systems for Reporting Norovirus
 
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        National Center for Immunization and Respiratory Diseases; Division of Viral Diseases
      Related PagesCaliciNet
      Related Pages
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        * CDC Systems for Reporting Norovirus
        * CaliciNet
        * CaliciNet Data
        * NoroSTAT
    * 
        * NoroSTAT Data
    * NoroSTAT Data Table
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    Norovirus
    Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States. Always wash your hands and handle food well.
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