An advisory group to the World Health Organization is to look at whether future COVID-19 vaccines will still need to include the index (original) SARS-CoV-2 virus as well as its later variants and says that any further recommendations on updating vaccine composition will be issued at its next meeting in May.
In the meantime, it “remains prudent” to try to achieve broader cross-reactive vaccine-induced immune responses, and manufacturers should continue to...
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