Centers for Disease Control and Prevention Director Dr. Rochelle Walensky said during a White House briefing that the government is contemplating a change to its mask guidance in the coming weeks.

One year into Dr. Rochelle Walensky’s tenure as director, her bid to make the Centers for Disease Control and Prevention more agile is being challenged by political pressures, vocal scientists and the changing virus itself.

The Centers for Disease Control and Prevention's advisers voted that a booster was safe for younger teens and should be offered to them once enough time — five months — has passed since their last shot.

Federal officials announced Monday a mass vaccination site will be opening in Gary, Indiana, as they warned of rising coronavirus cases across the country and urged residents to wear masks, social distance and limit travel.