London: A single dose of the COVID-19 vaccine can limit household transmission by up to half, according to a study by Public Health England released on Wednesday, signalling the effectiveness of the vaccines at preventing spread.
According to The Hill, the research — which has yet to be peer-reviewed — found that people who got COVID-19 three weeks after receiving one dose of either the Pfizer-BioNTech or AstraZeneca vaccines were between 38 per cent and 49 per cent less likely to give the virus to those in their household, compared to those who didn’t receive any vaccine dose.
Public Health England analyzed more than 57,000 contacts from 24,000 households in which a person who had received a vaccine dose tested positive for the virus and compared it with almost 1 million contacts of cases among unvaccinated people.
“We have shown that both the vaccines are associated with reduced likelihood of household transmission by 40-50 per cent from individuals diagnosed with…