>>The Food and Drug Administration says that some of the vials of Pfizer-BioNTech COVID-19 vaccine being distributed throughout the U.S. contain extra doses and the agency is encouraging hospitals and clinics to use the additional shots to speed up the nationwide immunization campaign.

The agency issued the guidance Wednesday after health care workers reported throwing out the excess vaccine, fearing it would be against the rules to use it.<<

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Questions arise in this case, such as Why the extra volume in some vials, where did it come from.

what is the effect on concentration of active components, and the final dilution to an individual dosage.

do these "extra" doses contain elevated amounts of settled components?

by extension approximately 2 doses of 7 out of a vial labled as 5 doses are off lable usage, in the strictest interpretation of the product lable.