The path forward : a federal perspective on the Covid-19 response : hearing of the Committee on Health, Education, Labor, and Pensions, United States Senate, One Hundred Seventeenth Congress, first session on examining a federal perspective on the Covid-19 response, focusing on the path forward, after receiving testimony from Rochelle P. Walensky, Director, Centers for Disease Control and Prevention, Anthony S. Fauci, Director, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Janet Woodcock, Acting Commissioner of Food and Drugs, Food and Drug Administration, and Dawn O'Connell, Assistant Secretary for Preparedness and Response, all of the Department of Health and Human Services, July 20, 2021.