National Notifiable Diseases Surveillance System : monitoring the occurrence and spread of diseases
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National Notifiable Diseases Surveillance System : monitoring the occurrence and spread of diseases

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      The Centers for Disease Control and Prevention (CDC)’s National Notifiable Diseases Surveillance System (NNDSS) is a multifaceted public health disease surveillance system that allows public health officials to monitor the occurrence and spread of diseases.

      State, local, territorial, and tribal health departments notify CDC of cases of specific diseases and conditions that they identify in their jurisdictions. Every year, the nation’s epidemiologists determine which of these diseases and conditions should be notifiable and how to define a case.

      Many state, territorial, tribal, and local health departments and partner organizations, such as the Council of State and Territorial Epidemiologists, use facets of NNDSS to

      • collect, manage, analyze, interpret, and disseminate health-related data for diseases and conditions designated as nationally notifiable;

      • develop and maintain national standards—such as consistent case definitions for nationally notifiable diseases and conditions—that are applicable across states;

      • maintain the official national notifiable diseases statistics;

      • provide detailed data to CDC programs to help identify specific disease trends;

      • work with other jurisdictions and partners to implement and assess prevention

      • and control programs; and

      • track national health trends published in summarized data findings from 57 state, territorial, and local reporting jurisdictions in the Morbidity and Mortality Weekly Report (MMWR).

      NNDSS is administered by the Division of Health Informatics and Surveillance in CDC’s Center for Surveillance, Epidemiology, and Laboratory Services in the Office of Public Health Scientific Services.

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