Two vaccines reduce the risk of infection with the Coronavirus after receiving a single dose

Scientists at the University of Oxford have released more data confirming that the two coronavirus vaccines, manufactured by the companies Pfizer Biontech and AstraZeneca, have significantly reduced the risk of infection after receiving a single dose.

In a study published on Friday, the researchers said that there is no clear difference in the ability of the two vaccines to reduce the rates of corona infection.

The study has not yet been published in a scientific journal, but it relies on data from nose and throat swabs taken from more than 370,000 participants in England and Wales between December and April.

The scientists said that, after three weeks of giving people a single dose of the Pfizer Bionic vaccine or the AstraZeneca vaccine, the rates of all cases of corona decreased by 65%.

The drop was even greater after the second dose, and the two vaccines appeared to protect people from the mutated virus that was first detected in the UK.

And Dr. Quinn Boyles, a researcher at the University of Oxford, indicated that there is some evidence that people who were vaccinated had reinfection, and that there was some limited spread of the disease from people who had been vaccinated.

Boyles said, "This confirms the need for everyone to continue to follow the instructions to reduce the risk of transmission, through social distancing and masks."

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