Waning vaccine immunity helping drive up UK infections, suggesting herd immunity unreachable, say scientists

Waning immunity from vaccines is a key cause of rising infections – but it is not the only factor, scientists say. The number of new Covid infections recorded in the past week has increased by 16 per cent against a backdrop of falling immunity among those who received their second jab a few months or longer ago. A growing number of studies have found that immunity begins to fall within a few months, although jabs continue to provide good protection, especially from more severe cases.