A study by the University of Oxford and the Office for National Statistics in the UK showed that the Oxford/AstraZeneca and Pfizer/BioNTech vaccines provided 65 per cent protection against coronavirus even in a single dose.
The results of the study showed that single doses of Oxford/AstraZeneca and Pfizer/BioNTech vaccines against coronavirus protect people as old and at risk as young, healthy people, the Guardian reported.
Researchers examined the Covid test results of more than 350,000 people between December and April. 21 days after the first dose was administered, it was stated that the rate of infection with coronavirus decreased by 65 percent. A single dose of the vaccine was found to be more effective in symptomatic infections than preventing asymptomatic infections.
The Pfizer vaccine is known to prevent 90 percent of symptomatic cases and 70 percent of asymptomatic cases in the second dose. The effect of the second dose of the Oxford/AstraZeneca vaccine has not yet been determined.