FILE PHOTO: Signage is seen outside of FDA headquarters in White Oak, Maryland

FILE PHOTO: Signage is seen outside of the Food and Drug Administration (FDA) headquarters in White Oak, Maryland, on Aug. 29, 2020. 

WASHINGTON, D.C. — The U.S. Food and Drug Administration on Thursday recommended booster doses of COVID-19 vaccines be modified to include components that are tailored to combat the Omicron BA.4 and BA.5 subvariants beginning this fall.

The FDA said it has not advised manufacturers to change the vaccine for the primary vaccination series, saying the coming year will be "a transitional period when this modified booster vaccine may be introduced".

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