According to the study, antibody levels are maintained for at least one year even after a single dose of the Oxford-AstraZeneca vaccine, known in India as Covishield.
AstraZeneca vaccine doses boost immunity over 11-month gap
AstraZeneca’s anti-Covid-19 vaccine produces better immunity when given at longer intervals of 45 weeks. At the same time, its third dose will increase the antibodies further. This has been claimed in a study conducted in Britain.
According to the study, antibody levels are maintained for at least a year even after a single dose of the Oxford-AstraZeneca vaccine, known in India as Covishield. In India, an interval of 12 to 16 weeks has been kept between its two doses.
The study authors noted that an extended interval of 45 weeks or 11 months between the first and second doses of the AstraZeneca vaccine resulted in an 18-fold increase in antibody levels measured 28 days after the second dose.
The study included people between the ages of 18 and 55.
The study was posted on Monday in The Lancet’s pre-print server. Volunteers aged between 18 and 55 years were included in the study. He was given a single dose or two doses of AstraZeneca.
Researchers from the University of Oxford in the UK conducted this study. They assessed immunity after an extended interval between the first and second doses and a subsequent dose.
According to the study, when an interval of 45 weeks was given between the first and second doses, the antibody levels were four times higher than at the 12-week interval. The researchers said that the study shows that a longer interval between two doses leads to the development of stronger immunity.
Andrew J. Pollard, director of the Oxford Vaccine Group at the University of Oxford, said, “This should be reassuring news for countries with low vaccine supplies. Pollard said in a statement, “Great results were seen when a second dose was given at an interval of 10 months after the first dose. The researchers noted that some countries are considering a third ‘booster’ dose in the future.
According to the results of the study, the third dose has been shown to have a highly effective effect against the alpha, beta and delta forms of COVID-19.
Also read: What is the difference of 3 months between two doses of Covishield? AstraZeneca gave information
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