The Centers for Disease Control and Prevention (CDC) is “committed to continuing to advance the science around COVID-19, moving more vaccines into more communities—especially those communities most at risk for COVID-19 infection—and working to improve health equity,” CDC Director Rochelle Walensky, MD, MPH, said during a March 2021 U.S. Senate Committee on Health, Education, Labor, and Pensions (HELP) hearing. She joined Anthony Fauci, MD, David Kessler, MD, and Peter Marks, MD, PhD, in sharing witness testimonies about their agencies’ response to the pandemic and how to better prepare for future threats.