WASHINGTON, DC – SEPTEMBER 23: Anthony Fauci, director of National Institute of Allergy and Infectious Diseases at NIH, attaches his mask before testifying at a Senate Health, Education, and Labor and Pensions Committee on Capitol Hill, on September 23, 2020 in Washington, DC. Dr. Fauci addressed the testing of vaccines and if they will be ready by the end of the year or early 2021. (Photo by Graeme Jennings- Pool/Getty Images)