WASHINGTON, DC - NOVEMBER 04:  Centers for Disease Control and Prevention Director Rochelle Walensky prepares to testify before the Senate Health, Education, Labor, and Pensions Committee about the ongoing response to the COVID-19 pandemic in the Dirksen Senate Office Building on Capitol Hill on November 04, 2021 in Washington, DC. Earlier this week Walensky gave final approval for the Pfizer-BioNTech coronavirus vaccine for children between 5 and 11 years old. (Photo by Chip Somodevilla/Getty Images)