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WATCH: FDA committee endorses emergency use for Johnson & Johnson COVID-19 vaccine

U.S. health advisors endorsed a one-dose COVID-19 vaccine  from Johnson & Johnson on Friday, putting the nation on the cusp of adding an easier-to-use option to fight the pandemic.

Watch the committee meeting in the video player above.

The Food and Drug Administration is expected to quickly follow the recommendation and make J&J’s shot the third vaccine authorized for emergency use in the U.S.

Vaccinations are picking up speed, but new supplies are urgently needed to stay ahead of a mutating virus that has killed more than 500,000 Americans.

After daylong discussions, the FDA panelists voted unanimously that the benefits of the vaccine outweighed the risks for adults.

READ MORE: 8 tips for finding a COVID-19 vaccine

If the FDA agrees, shipments of a few million doses could begin as early as Monday.

More than 47 million people in the U.S., or 14 percent of the population, have received at least one shot of the two-dose vaccines from Pfizer and Moderna, which FDA authorized in December.

But the pace of vaccinations has been strained by limited supplies and delays due to winter storms.