Division of Health Informatics and Surveillance, Center for Surveillance, Epidemiology and Laboratory Services, Office of Public Health Scientific Services (Drs Adekoya and Ajani), and Office of the Director, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (Dr Truman), Centers for Disease Control and Prevention, Atlanta, Georgia.

Correspondence: Nelson Adekoya, DrPH, Office of Public Health Scientific Services, Center for Surveillance, Epidemiology and Laboratory Services, 1600 Clifton Rd, NE, MS-E91, Atlanta, GA 30333 ([email protected]).

The authors thank Susan Katz, Emmanuel Maurice, and Hong Zhou for their programming and statistical assistance; C. Kay Smith for editorial assistance; and state epidemiologists for their review and approval of the manuscript. The authors also acknowledge jurisdictions' participation in the National Notifiable Diseases Surveillance System.

The authors declare no conflict of interest. The authors are employees of the federal government, and this work was completed as part of routine duties. No Human Research Protection approval was required because the study involved secondary analysis of data sets that did not involve human research. The findings and conclusions in this article are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.

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