Just one dose of a Covid jab can slash transmission by up to half, according to a major new study from Public Health England.
The breakthrough research offers further hope that the pandemic can be brought under control as vaccinated people are less likely to pass the virus onto others.
The new study found that people given a single dose of either the Pfizer or AstraZeneca vaccines - and who became infected at least three weeks later - were between 38 per cent and 49 per cent less likely to pass the virus on to people living in their homes, compared to those who were unvaccinated.
Protection was seen from around 14 days after vaccination, with similar levels regardless of a person's age. Other studies have already shown that both vaccines