Study shows protection against Covid starts to wane several months after full vaccination
Scientists have urged eligible people to have Covid booster shots after a major survey in England found evidence of “breakthrough infections” more than three months after full vaccination.
Researchers at Imperial College London analysed more than 100,000 swabs from a random sample of the population and found that Covid infection rates were three to four times higher among unvaccinated people than those who had received two shots.
