About the Authors

Juliet E Bryant

To whom correspondence should be addressed. E-mail: jebryant@pasteur.fr (JEB); abarrett@utmb.edu (ADTB)

Affiliations Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America , Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas, United States of America , Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America , Institut Pasteur, National Center for Laboratory and Epidemiology, Vientiane, Lao People's Democratic Republic

Edward C Holmes

Affiliations Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, United States of America , Center for Infectious Disease Dynamics, The Pennsylvania State University, University Park, Pennsylvania, United States of America , Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America

Alan D. T Barrett

To whom correspondence should be addressed. E-mail: jebryant@pasteur.fr (JEB); abarrett@utmb.edu (ADTB)

Affiliations Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America , Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas, United States of America , Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JEB, ECH, and ADTB wrote the paper with equal contribution. JEB performed the viral gene sequencing. ECH performed the phylogenetic analysis.