A single dose of the COVID-19 vaccine made by the pharmaceutical company Pfizer PFE,
and its partner BioNTech BNTX,
reduces infections and reduces the risk of transmission, according to a new study.
A study by the Cambridge Health Hospitals National Health Service Foundation Trust and the University of Cambridge examined health workers in January, where a similar number of vaccinated and unvaccinated staff were examined.
It was found that 26 of 3,252, or 0.8%, tests of unvaccinated health workers were positive. This compares with 13 of 3,535, or 0.37%, tests of health workers less than 12 days after vaccination, and four of 1,989, or 0.2%, tests of health workers at 12 days or more after of vaccination.
“This is great news: the Pfizer vaccine not only provides protection against SARS-CoV-2 disease, but also helps prevent infection, reducing the chance of the virus being transmitted to other people,” said Dr . -disease specialist, who led the study.
This suggests a fourfold decrease in the risk of asymptomatic COVID-19 infection among health care workers who have been vaccinated for more than 12 days, according to the researchers, with a half-reduced level of infection for those vaccinated less than 12 days. . The study has not been peer-reviewed.
The Pfizer – BioNTech vaccine is given in two doses. In the US, the interval between doses is three weeks, while in the UK the interval is up to 12 weeks.
A growing body of evidence demonstrates the effectiveness of the Pfizer – BioNTech vaccine in the UK and Israel, two of the leading countries in mass vaccination.