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A fourth Covid jab is not yet needed, say UK experts, because booster doses continue to provide high protection against severe disease from the Omicron variant among older adults.

UK Health Security Agency data show three months after boosting, protection against hospitalisation remains at about 90% for people aged 65 and over.

Protection against mild symptomatic infection is more short-lived.

That drops to around 30% by about three months.

Figures also show why it is important to get a booster dose if you have only had two doses so far.