Jodi Vanden Eng*, Ruthanne Marcus* , James L. Hadler†, Beth Imhoff‡, Duc J. Vugia§, Paul R. Cieslak¶, Elizabeth Zell‡, Valerie Deneen#, Katherine Gibbs McCombs**, Shelley M. Zansky††, Marguerite A. Hawkins‡‡, and Richard E. Besser‡

Author affiliations: *Connecticut Emerging Infections Program, New Haven, Connecticut, USA; †Connecticut Department of Public Health, Hartford, Connecticut, USA; ‡Centers for Disease Control and Prevention, Atlanta, Georgia, USA; §California Department of Health Services, Berkeley, California, USA; ¶Oregon Department of Human Services, Portland, Oregon, USA; #Minnesota Department of Public Health, Minneapolis, Minnesota, USA; **Georgia Division of Public Health, Atlanta, Georgia, USA; ††New York State Department of Health, Albany, New York, USA; ‡‡University of Maryland School of Medicine, Baltimore, Maryland, USA