COVID Vaccines: XBB Strain Easy Call, But Disagreements Abound Between FDA, Advisors On Logistics

It took little convincing for FDA advisors to support changing COVID-19 vaccines to monovalent XBB formulations, but the committee still isn’t sold on the agency’s annual influenza-like campaign strategy for COVID vaccines and raised several harder calls that FDA and CDC will need to make including when to cut off bivalent shots use and who should get XBB.