Double vaccinated people are three times less likely than unvaccinated people to test positive for coronavirus, according to the React-1 study.
The study, a major Covid monitoring programme, led by scientists from Imperial College London are based on swab tests taken by almost 100,000 people in England between 24 June and 12 July.
During this period, 0.63% of people were infected, or 1 in 1
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