Affiliation: | 1. Center for Health Studies, Universidad del Valle de Guatemala, , Guatemala City, Guatemala;2. International Emerging Infections Program, US Centers for Disease Control and Prevention, Regional Office for Central America and Panama, , Guatemala City, Guatemala;3. Division of Global Disease Detection and Emergency Response, US Centers for Disease Control and Prevention, , Atlanta, Georgia;4. Division of Viral Diseases, US Centers for Disease Control and Prevention, , Atlanta, Georgia;5. Ministry of Public Health and Social Welfare, , Guatemala City, Guatemala |