The U.S. drug regulator gave Moderna Inc. clearance to speed up output of the company’s Covid-19 vaccine by letting it fill a single vial with up to 15 doses, with the United States banking on rapid immunization to stem the spread of the deadly virus.

Drugmaker Baxter International Inc. will help fill in vials and package about 60-90 million doses of Moderna Inc.’s Covid-19 vaccine in 2021, the companies said.

Moderna Inc. proposed filling vials with additional doses of the Covid-19 vaccine to ease a crunch in manufacturing as the company approaches the manufacturing of almost a million doses a day.

Moderna Inc. asked the U.S. Food and Drug Administration for permission to fill the company’s Covid-19 vaccine vials with up to five additional doses to ease a crunch in manufacturing, CNBC reported.