WHO also suggested no longer including the original COVID-19 strain in future vaccines.
New formulations should aim to produce antibody responses to the XBB.1.5 or XBB.1.16 variants, the advisory group said, adding that other formulations or platforms that achieve neutralizing antibody responses against XBB lineages could also be considered.
COVID-19 vaccine makers like Pfizer, Moderna and Novavax are already developing versions of their respective vaccines targeting XBB.1.5 and other currently circulating strains.The U.S. Food and Drug Administration is also set to hold a meeting of outside experts in June to discuss the strain compositions of COVID-19 shots for later this year; vaccine manufacturers will be expected to update their shots once the strains are selected.
WHO’s advisory group, which recommends if changes are needed to the composition of future COVID-19 shots, said currently approved vaccines should continue to be used in accordance with the agency’s recommendations.
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