Decline in COVID-19 cases 'may be stalling' -CDC head

"Over the last few weeks, cases and hospital admissions in the United States have been coming down since early January and deaths have been declining in the past week. But the latest data suggest that these declines may be stalling," Walensky said.

The White House is working on a broad campaign to educate Americans about the vaccine as it seeks to bring the pandemic that has killed more than 500,000 people in the United States under control.

President Joe Biden on Thursday noted concerns that later this spring supply of the vaccines would outstrip demand because of vaccine hesitancy.