US FDA advises COVID vaccine makers to develop shots aimed at XBB.1.5 variant

Reuters

Published Jun 16, 2023 04:22PM ET

(Reuters) - The U.S. Food and Drug Administration (FDA) said on Friday it has advised manufacturers that are updating their COVID-19 vaccines to develop monovalent shots to target the XBB.1.5 subvariant.

So-called monovalent, or single-target vaccines, would be a change from the most recent bivalent COVID boosters that targeted both the original and Omicron strains of the coronavirus.

The FDA's advice comes a day after its panel of experts unanimously recommended that the updated COVID shots being developed for a fall vaccination campaign target one of the currently dominant XBB coronavirus variants.