Mr. Slavitt was appointed to the temporary leadership position in January. The position was set to expire in June.
“Even as so much of what we cherish is returning, we cannot let our progress be a reason for taking our foot off the pedal,” Mr. Slavitt said June 8 during his last White House briefing. “Threats remain. We must push harder so more Americans can return to normal life and the peace of mind that comes with being vaccinated.”