Millions of adults could be offered a fourth Covid jab this autumn after a study revealed they give protection ‘above and beyond’ that provided by a third dose.
But the authors of the study said that it provided a ‘hint’ that a small number of people might reach a ‘ceiling’ in terms of the amount of protection that they could get from a fourth jab.
Prof Faust highlighted that the recent Omicron wave means most people will have been infected recently and now have high antibody levels, which means they are unlikely to gain much from another dose. ‘It is for policymakers and the joint committee to decide when to deploy, if to deploy, a fourth dose, depending on the pandemic and depending on whether there is a new variant that’s more severe.’For most this will have been a fourth vaccine dose, but for some with a weakened immune system it will have been their fifth.
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