| Anita Patel | National Center for Immunization and Respiratory Diseases (NCIRD), Centers for Disease Control and Prevention (CDC), US Public Health Service, Division of Preparedness and Emerging Infections both in the National Center for Emerging and Zoonotic Infectious Diseases, Atlanta. The findings and conclusions in this article are those of the authors and do not necessarily represent the official position of the US Centers for Disease Control and Prevention. |