Three different COVID-19 vaccines are authorized for use in the U.S., with two of these requiring the administration of two doses. But can you mix and match the vaccines? The Pfizer-BioNTech, Moderna, and Johnson & Johnson vaccines are all being administered in the United States, but whereas the Johnson & Johnson vaccine only requires one shot for immunization, the Pfizer-BioNTech and Moderna vaccines each require two doses, administered several weeks apart. This has raised the question of whether or not it’s safe or effective to receive one dose of the Pfizer-BioNTech vaccine followed by one dose of the Moderna vaccine, or vice versa. Scientists are investigating the idea, but in the meantime they’ve told healthcare providers to follow current vaccine guidelines and to not mix and match COVID-19 vaccines. “COVID-19 vaccines are not interchangeable,” the U.S. Centers for Disease Control ( CDC ) says. “The safety and efficacy of a mixed-product series have not been evaluated. Both doses of the series should be completed with the same product,” it continues, adding that “every effort should be made to determine which vaccine product was received as the first dose to ensure completion of the vaccine series with the same product.” If… Read full this story
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