Clinical Research, N=AID, NIH, Ft. Detrick, MD 5. Poxvirus Team, Poxvirus and Rabies Branch, Division of High Conseque=ce Pathogens and Pathology, National Center of Emerging Zoonotic a=d Infectious Diseases, Centers for Disease Control and Prevention,&nbs=;Atlanta, GA 6. Department of Pathology and Laboratory Medicine, Weill Med