Fast-evolving COVID variants complicate vaccine updates - Nature.com

COVID-19 vaccines are due for an upgrade, scientists say, but emerging variants and fickle immune reactions mean it’s not clear what new jabs should look like.

Vaccines might become more effective if they target newer variants of the SARS-CoV-2 virus, not just the original one.Credit: Joseph Prezioso/AFP/Getty As countries brace for another Omicron wave dr… [+7508 chars]

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