According to the study, which ran from September 2020 to September 2021 and included 440 households in London and Bolton doing PCR Covid tests:
- People who are double jabbed have a lower, but still appreciable, risk of becoming infected with the Delta variant compared with unvaccinated people
- They also appear to be just as infectious
- Vaccinated people clear the infection more quickly, but their peak viral load - when people are most infectious - is similar to that seen in unvaccinated people
- This may explain why they can still readily pass on the virus in household settings