WASHINGTON — The Food and Drug Administration on Friday issued guidance regarding the use of injector devices to administer flu vaccines to patients.

The FDA said that healthcare professionals should not use such clinical devices to administer flu vaccines, adding that all vaccines, including influenza, "be administered in accordance with their labeling."

"At this time, there are no vaccines for the prevention of influenza disease that are approved by the FDA for administration by jet injector ... [they] have not been evaluated for delivery by jet injection," the FDA said in its guidance.

Only one vaccine is approved for administration via jet injector: the measles mumps and rubella vaccine (also known as MMR), the agency said, adding that it has no safety and efficacy data for other vaccines delivered by jet injector.

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