Affiliation: | 1.Immunization Services Division, National Center for Immunization and Respiratory Diseases, CDC; 2.CDC COVID-19 Response Team; 3.Division of Tuberculosis Elimination, National Center for HIV, Viral Hepatitis, STD, and TB Prevention, CDC; 4.Stat-Epi Associates, Inc., Ponte Vedra Beach, Florida; 5.General Dynamics Information Technology Inc., Falls Church, Virginia. |