President Joe Biden tours the Viral Pathogenesis Laboratory at the National Institutes of Health Laboratory Thursday, Feb. 11, 2021, in Bethesda, Maryland. From left, Deputy Director of the NIH NIAAID Vaccine Research Center Dr. Barney Graham, Chief Medical Adviser to the President Dr. Anthony Fauci, White House COVID-19 Response Coordinator Jeff Zients, NIH Director Dr. Francis Collins, and Senior Research Fellow and Coronavirus Team Lead at the NIAIC Vaccine Research Center Dr. Kizzmekia Corbett.