There is “broad agreement” that COVID-19 vaccines for use in the next winter season in the northern hemisphere should include only one virus strain and be based on the XBB family of Omicron subvariants, such as XBB.1.5, according to the International Coalition of Drug Regulatory Authorities.
International Regulators Focus On Omicron XBB For Monovalent COVID-19 Vaccine
A workshop led by the European Medicines Agency and the US Food and Drug Administration sought to reach alignment on adapting COVID-19 vaccines to emerging virus variants.

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