Moderna will move up delivery for two rounds of 100 million COVID-19 vaccine doses by months, the company announced Tuesday.
Doses originally scheduled to be delivered at the end of June now are scheduled for the end of May, per the Washington Examiner.
A second 100 million doses that had been targeted for the end of September will be shipped by the end of July.
"These commitments reflect a ramping up of production over the last few months and an expectation of further ramp up over the coming months," the company said.
Moderna's announcement came days after President Joe Biden announced his administration had purchased an additional 100 million doses of COVID-19 vaccines from both Pfizer Inc. and Moderna.
The federal government overall has purchased 300 million Moderna vaccines.
The total number of combined Moderna and Pfizer vaccine doses amounts to 600 million -- enough to vaccinate the majority of the U.S. population.
The Department of Health and Human Services purchased 200 million doses of the Moderna vaccine under former President Donald Trump before the drug was granted authorization for public use. HHS also purchased 200 million doses of Pfizer's COVID-19 vaccine last year.
Moderna said recent delays in shipping the vaccine were due to unspecified issues with a New Jersey-based contractor charged with completing the final stages of vaccine manufacturing.
"These delays are expected to be resolved in the near term and are not expected to impact monthly delivery targets," Moderna said.
Moderna's updated timeline will not be reflected in weekly immunization rates, which are "expected to be volatile and may not reflect the underlying trajectory of manufacturing scale-up," the company warned.
Moderna said it had been in constant communication with the government to provide transparency on expected delivery dates.
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