1. Poxvirus and Rabies Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Rd. NE, Atlanta, Georgia 30333, USA
2. Center for Global Health, Global Immunization Division, Centers for Disease Control and Prevention, 1600 Clifton Rd. NE, Atlanta, Georgia 30333, USA
3. Department of Ecology and Evolutionary Biology, University of Tennessee, 1416 Circle Dr., Knoxville, Tennessee 37996, USA
4. LYSSA LLC, 309 Pirkle Ferry Rd., Suite D300, Cumming, Georgia 30040, USA