Reported by: Edward W. Hook, III, MD, Univ of Alabama, Birmingham. William Shafer, PhD, Emory Univ, Atlanta, Georgia. Carolyn Deal, PhD, National Institute for Allergy and Infectious Disease, National Institutes of Health, Bethesda, Maryland. Robert D. Kirkcaldy, MD, Div of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention; John Iskander, MD, Office of the Associate Director for Science, CDC. Corresponding contributor: Robert D. Kirkcaldy, firstname.lastname@example.org, 404-639-8659.