English data shows vaccines cut household Covid-19 transmission by up to a half
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.
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.