President Joe Biden speaks during a COVID-19 briefing at CDC headquarters in Atlanta, along with Dr. Rochelle Walensky. The administration has backed up public health guidance from the agency.

President Joe Biden speaks during a COVID-19 briefing at the headquarters for the Centers for Disease Control and Prevention, Friday, March 19, 2021, in Atlanta, as Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, center, listens. (AP Photo/Patrick Semansky)