| Authors: |
Tappe J; Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, CDC, Atlanta, GA 30333, United States. Electronic address: qyi8@cdc.gov., Leung J; Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, CDC, Atlanta, GA 30333, United States., Mathis AD; Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, CDC, Atlanta, GA 30333, United States., Oliver SE; Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, CDC, Atlanta, GA 30333, United States., Masters NB; Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, CDC, Atlanta, GA 30333, United States. |