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Up to three Covid jabs a year could be needed for protection, data suggests
UK analysis indicates Pfizer and Moderna boosters less effective against Omicron than Delta variant and appear to drop away further after nine weeks
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Australians may have to receive two or even three Covid jabs each year to maintain defences against the virus if early results on the efficacy of booster shots turn out to be a useful guide.
Weekly data published just before Christmas by the UK’s Health Security Agency shows the effectiveness of both the Pfizer and Moderna boosters against symptomatic diseases is lower for the Omicron than the Delta variant across all periods after the injection.
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Read the original article at The Guardian