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  • Single COVID-19 vaccine dose cuts household transmission by half, U.K. data shows

Single COVID-19 vaccine dose cuts household transmission by half, U.K. data shows

Published on April 28, 2021 at 11:47 AM

COVID-19 vaccines deployed in England can cut transmission of the coronavirus by up to a half, data from Public Health England showed on Wednesday, in addition to the protection the shots offer against symptomatic infection.

New research showed that people who became infected with the coronavirus three weeks after receiving one dose of Pfizer or AstraZeneca vaccine were between 38% to 49% less likely to pass it on to household contacts compared to those who were unvaccinated.

The shots also stop a vaccinated person developing infection to start with, reducing the risk by around 60% to 65% from four weeks after one dose of either vaccine.

Read more: Vaccinated Americans can now go maskless in these situations, CDC says

“This study is the most comprehensive real-world data showing they also cut transmission of this deadly virus,” health minister Matt Hancock said.

“It further reinforces that vaccines are the best way out of this pandemic as they protect you and they may prevent you from unknowingly infecting someone in your household.”

The study included over 57,000 contacts from 24,000 households in which there was a lab-confirmed case that had received a vaccination, Public Health England said, compared with nearly 1 million contacts of unvaccinated cases.

(Reporting by Alistair Smout; editing by Sarah Young)

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