Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, speaks during a White House briefing on the Biden administration’s response to the COVID-19 pandemic.

In this image from video, Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, speaks during a White House briefing on the Biden administration’s response to the COVID-19 pandemic Wednesday, Jan. 27, 2021, in Washington. (White House via AP)