Moderna Increases COVID-19 Vaccine Shipments While Pfizer Lags Behind

A worker carries boxes containing the Pfizer-BioNTech COVID-19 vaccine that were being prepared for shipment from a Pfizer facility in Portage, Mich., in December.

The two companies producing COVID-19 vaccines for use in the United States will have to raise production to meet contractual goals of 100 million doses each by the end of March.

(Image credit: Morry Gash/Pool/Getty Images)

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