Britain could face another year-and-a-half of Covid misery despite a hugely successful vaccination drive, scientists have warned on the back of data showing immunity from booster jabs starts to fade after just 10 weeks.
Early real-world analysis of the UK’s immunisation scheme shows the efficacy of Pfizer’s top-up dose at preventing symptoms drops to as low as 35 per cent two-and-a-half months after getting a third dose, among people already given a full course of AstraZeneca.
But immunity levels appear