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The Centers for Disease Control and Prevention (CDC) has updated their interim guidelines for administering the coronavirus vaccine to indicate that the first and second doses of approved doses can be given up to six weeks apart.
The CDC, however, continues to assert that the second dose should not be given before the recommended window of three to four weeks depending on the vaccine given.
The agency released the changes without fanfare on Thursday.
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“The second dose should be given as close to the recommended interval as possible,” the CDC said. “However, if it is not possible to meet the recommended interval, the second dose of Pfizer-BioNTech and Moderna COVID-19 vaccines can be scheduled for administration up to 6 weeks (42) days after the first dose. . data on the efficacy of COVID-19 mRNA vaccines administered beyond this window. If the second dose is administered beyond these intervals, there is no need to restart the series. “
The update comes amid a vaccine shortage that has resulted in thousands of appointments being canceled across the country. Governors have expressed concerns about available doses, particularly after the Trump administration advised against reserving second doses.
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However, despite fears of vaccine shortages, the CDC cautions that vaccines are not interchangeable and should not be used as such.
“However, these COVID-19 mRNA vaccines are not interchangeable with each other or with other COVID-19 vaccine products,” the update states. “The safety and efficacy of a series of combination products have not been evaluated. Both doses in the series should be supplemented with the same product.”
The update also included advice for patients who have a history of skin fillers after cases of facial swelling after vaccination.
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“It appears to be temporary and can resolve with medical treatment, including corticosteroid therapy,” the agency said of the swelling. “COVID-19 MRA vaccines can be given to people who have received injectable skin fillers who have no contraindication to vaccination.”
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