1. School of Medicine; University of California; San Diego San Diego CA USA
2. Division of Dermatology; Department of Medicine; David Geffen School of Medicine; University of California; Los Angeles Los Angeles CA USA
3. Division of Infectious Diseases; Rady Children's Hospital-San Diego; San Diego CA USA
4. Division of Infectious Diseases; School of Medicine; University of California; San Diego San Diego CA USA
5. Department of Pediatrics; School of Medicine; University of California; San Diego San Diego CA USA
6. Poxvirus and Rabies Branch; Division of High-Consequence Pathogens and Pathology; National Center for Emerging and Zoonotic Infectious Diseases; Centers for Disease Control and Prevention; Atlanta GA USA
7. Epidemic Intelligence Service; Atlanta GA USA
8. Department of Dermatology; Rady Children's Hospital-San Diego; San Diego CA USA
9. Department of Dermatology; School of Medicine; University of California; San Diego San Diego CA USA