Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases and chief medical adviser to the president, right, and Dr. Rochelle Walensky, Director of the Centers for Disease Control and Prevention, left, testify before a Senate Health, Education, Labor, and Pensions Committee hearing to examine the federal response to COVID-19 and new emerging variants, Tuesday, Jan. 11, 2022 on Capitol Hill in Washington. (Shawn Thew/Pool via AP)