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Notice to Readers: NNDSS Tables have Updated "N" Indicators for the Year 2008

The 2008 Council of State and Territorial Epidemiologists (CSTE) State Reportable Conditions Assessment (2008 SRCA) has collected data from each reporting jurisdiction (i.e., 50 U.S. states, the District of Columbia, New York City, and five U.S. territories) to determine which of the nationally notifiable infectious diseases (NNIDs) were reportable in each reporting jurisdiction during 2008. The 2008 assessment is the second SRCA project conducted by CSTE with assistance from CDC (1). The 2008 SRCA gathered information regarding whether the condition is explicitly reportable (i.e., listed as a specific disease or as a category of diseases on reportable disease lists) or whether it is implicitly reportable (i.e., included in a general category of the reportable disease list, such as "rare diseases of public health importance") Only conditions that were explicitly reportable were considered reportable under 2008 SRCA methodology.

Results of the 2008 SRCA will be used to indicate whether a specified NNID is not notifiable for a specified period and reporting jurisdiction. This information is noted with an "N" indicator (for "not notifiable") in the MMWR Table II weekly update (Provisional cases of selected notifiable diseases, United States) and in the annual MMWR Summary of Notifiable Diseases, United States. This notation will allow readers to distinguish whether 1) no cases were reported even though the condition is reportable or 2) no cases were reported because the condition is not reportable.

The 2008 SRCA data collection concluded in February 2009; results will be used to populate the "N" indicators for NNDSS data in both 2008 and 2009 MMWR data tables. The 2009 NNDSS data displayed in the MMWR weekly provisional tables will reflect reporting requirements gathered from the 2008 SRCA until 2009 SRCA official results are available.


  1. CDC. Changes to MMWR table I and presentation of National Notifiable Diseases Surveillance System data---January 2008. MMWR 2008;57:14.

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Date last reviewed: 3/5/2009


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