The upstart drugmaker Moderna is asking U.S. regulators to permit it to extend the quantity of coronavirus vaccine put into every vial by as a lot as 50 %, arguing that it could actually velocity vaccines to sufferers by clearing away a easy manufacturing bottleneck: Getting drugs into bottles.

The Meals and Drug Administration may determine inside just a few weeks how way more vaccine Moderna, the developer of one of the two federally authorized Covid-19 vaccines, can put into its vials. Moderna says it could actually increase the variety of doses per vial from 10 to as a lot as 15.

The corporate has already been ramping up manufacturing of its vaccine, solely to discover a bottleneck within the bottling, capping and labeling course of. With F.D.A. approval, extra doses may begin going into every bottle rapidly, a great addition to the marketing campaign to curb a pandemic that has killed greater than 440,000 folks in america alone. In an announcement late Monday, Ray Jordan, a Moderna spokesman, stated the constraint on dosage per vial was limiting Moderna’s output.

The Moderna proposal is a part of a broader push by the Biden administration to hurry vaccine distribution, together with by clearing away obstacles within the “fill and end” section of producing. Though the nuts-and-bolts stage receives much less consideration than vaccine improvement, it has been recognized for years as a constraint on vaccine manufacturing.

On Tuesday, Jeffrey D. Zients, the White Home’s Covid-19 response coordinator, stated that the federal authorities would allocate a minimal of 10.5 million doses of coronavirus vaccines to states for the following three weeks, a bump of 5 % ensuing from an anticipated enhance in manufacturing.

At a White Home information convention, Mr. Zients framed the rise in doses as an accomplishment of the Biden administration, saying that “we’ve got elevated provide by greater than 20 % since we took workplace.” However the uptick in manufacturing has lengthy been anticipated as the businesses that make two federally licensed vaccines, one from Pfizer and BioNTech and the opposite from Moderna, have scaled up their efforts. Final week, the businesses elevated their provide to the U.S. by 16 %.

Governors have been knowledgeable of the rise on a name Tuesday morning in order that they’d have extra time to plan for vaccinations, Mr. Zients stated, with at three weeks of discover for brand spanking new allocation numbers — a cornerstone of a brand new effort by the Biden administration to enhance a distribution system mired in uncertainty and confusion over restricted provide and unused doses.

“That enables them to plan accordingly and know what staffing to have,” he stated. “I feel traditionally, there had been fluctuation. We’re very attuned into not having that fluctuation.”

Moderna has mentioned the attainable change of the variety of doses in vials with the F.D.A. however has not but submitted manufacturing information to help it, folks acquainted with the discussions stated. Federal regulators could also be receptive to the concept of extra doses in every vial, however may balk on the notion of a 50 % enhance.

The trade commonplace has lengthy been 10 doses per vial, and federal regulators could also be involved that the additional punctures by needles of the rubber masking of the vial and the time required to extract extra doses may enhance the chance of contaminating the vaccine with micro organism. Moderna’s proposal to the F.D.A. for the dose enhance was first reported by CNBC.

Packing extra vaccine into every Moderna vial is one among numerous choices White Home and well being officers are exploring as they push to increase manufacturing earlier than the spring, when officers expect a renewed surge of infections from rising variants of the virus.

The maker of the opposite federally accredited vaccine, Pfizer, is unable to extend the quantity of vaccine in its vials as a result of its manufacturing is geared towards a selected measurement of vial that may maintain solely about six doses. However Moderna’s vial is sufficiently big to carry greater than the ten doses now allowed.

Requested about Moderna’s proposal, a White Home spokesman on Monday stated that “all choices are on the desk.”

Amongst different efforts, Mr. Zients stated that the federal government had now ensured that specialised syringes have been shipped out with Pfizer’s vials so practitioners may extract a sixth dose from them. Dr. Albert Bourla, Pfizer’s chief government, instructed traders Tuesday that the corporate was now two months forward of schedule and anticipated to ship a complete of 200 million doses for People by the top of Might as a substitute of the top of July. The acceleration is at the least partly as a result of the federal government has determined to rely Pfizer vial as six doses as a substitute of 5.

Prashant Yadav, who research well being care provide chains with the Middle for International Growth in Washington, stated Moderna may be capable of “comparatively rapidly” make extra of its vaccine if it acquired the inexperienced mild so as to add doses to every vial.

However he stated it will not be an immediate change. “I don’t suppose Moderna has a surplus sitting round,” he stated.

Mr. Yadav stated the finish-and-fill course of is extremely automated, dedicated to avoiding contamination and exact to the microgram. At prime velocity, as many as 1,000 vials of vaccine could be crammed per minute, he stated.

He stated a 15-dose vial carries a trade-off: It may result in extra wasted doses if the well being care skilled runs out of individuals to get inoculated and has to throw out the remainder of the doses. However within the midst of a raging pandemic, consultants stated, that could be a danger that federal well being officers can be keen to take.