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Notice to Readers: Addition of Novel Influenza A Virus Infections to the National Notifiable Diseases Surveillance System, 2007

On January 9, 2007, the Executive Committee of the Council of State and Territorial Epidemiologists (CSTE) approved an interim position statement, adding novel influenza A virus infections* to the National Notifiable Diseases Surveillance System (NNDSS) (1). This issue of MMWR adds novel influenza A virus infection to Table I (Provisional cases of infrequently reported notifiable diseases, United States). The addition of this infection to NNDSS is expected to facilitate the following: 1) timely identification and confirmation of cases, 2) timely reporting of cases to CDC, and 3) early initiation of appropriate health responses to human infections with novel influenza A viruses that might have pandemic potential.

These infections must be reported immediately to the World Health Organization under the revised International Health Regulations (IHR) approved by the World Health Assembly on May 23, 2005 (2). The revised regulations will take effect in the United States on June 15, 2007. CDC is collaborating with partners to develop plans to implement the revised IHR by that date.


  1. Council of State and Territorial Epidemiologists. National reporting of novel influenza A virus infections, submitted January 5, 2007, and approved January 9, 2007. Available at
  2. World Health Organization. Revision of the international health regulations. Geneva, Switzerland: World Health Organization; 2005. Available at

* Defined as human infections with influenza A viruses that are different from currently circulating human influenza H1 and H3 viruses.

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