Study: One dose of corona vaccine reduces infection among household members by 50%

A study conducted by the English Public Health Agency showed that a single dose of the Pfizer or AstraZeneca vaccine can reduce the likelihood of transmitting the Corona virus by almost half among residents of one household where the risk of infection is high.

And the Public Health Authority in England said in a statement that people who contracted the virus three weeks after receiving a dose of the vaccine were 38% to 49% less likely than those who had not been vaccinated, to transmit the virus to their family members.

This level of protection is similar to that observed on the fourteenth day after vaccination, regardless of the age of the person vaccinated or the number of family members.

British Health Minister Matt Hancock said, "It is great news. We already knew that vaccines save lives and this study, the most comprehensive that has been conducted in real conditions, also shows that they reduce the transmission of this deadly virus."

The study included 57,000 people from 24,000 families, where a person who received the vaccine was confirmed to be infected, and they were compared to about one million unvaccinated people.

The agency considered the families as "high risk" places in terms of transmission, and added, "Similar results can be recorded in places with similar risks of transmission, such as shared housing and prisons."

The organization notes that a single dose of the vaccine can also, after four weeks, reduce the appearance of symptoms by 60 to 65%.

The agency's previous studies showed that the Pfizer and AstraZeneca vaccines prevented the risk of death in 10,400 cases among people over the age of 60 at the end of March.

The United Kingdom, the country worst affected by the virus in Europe, where more than 127,000 people have died, launched a large-scale vaccination campaign at the beginning of December, and is currently using the AstraZeneca, Pfizer / Bionic and Moderna vaccines.

Nearly 34 million first doses have been given, and a quarter of the adult population, or 13.2 million people, have received a second dose, according to official figures released Tuesday.