File picture: A health worker vaccinates a patient in Los Angeles, California, US. Image Credit: AFP

Washington: The US Food and Drug Administration (FDA) on Wednesday authorized using a so-called “mix and match” strategy for eligible people who require a booster shot of a COVID-19 vaccine after their primary series.

“The FDA has determined that the known and potential benefits of the use of a single heterologous booster dose outweigh the known and potential risks of their use in eligible populations,” the agency said in a statement.

The Pfizer, Moderna, and Johnson & Johnson vaccines are authorized in the United States. A single dose of any of them may now be used following completion of primary vaccination with a different COVID-19 vaccine.