New Covid variants are circulating. What do we know and will the Omicron-specific booster be effective?

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New Covid variants are circulating. What do we know and will the Omicron-specific booster be effective?
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WHO says the strains are not different enough to label them variants of concern, but experts urge staying up to date with vaccines

says XBB and BQ.1 are not different enough from each other, or from other Omicron lineages, to warrant labelling them new variants of concern.

Sign up for our free morning and afternoon email newsletters from Guardian Australia for your daily news roundupThe Victorian department of health says the ability of XBB and BQ.1 to escape immunity from past infection, combined with waning immunity from past vaccination, are driving rises in cases overseas. It is why remaining up to date with booster shots is critical.

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