Covid vaccine 66 per cent less effective at preventing infection than it was just two months ago, expert says

Covid cases have hit record levels in the UK, yet the vaccine is less effective at preventing infection than at any time since it was introduced, according to a leading virus modeller. The degree of protection a jab gives against getting a Covid infection has tumbled from about 30 per cent two months ago to about 10 per cent today, according to Professor Karl Friston, of University College London. This is largely because the new dominant Omicron subvariants, BA.4 and BA.5, are much better at evading immunity built up by vaccinations than their predecessor, BA.2, he says.