A long interval between the two doses of AstraZeneca would improve its effectiveness


Researchers see it as reassuring for countries with vaccine supply problems.

An interval of up to 45 weeks between two doses of AstraZeneca

If you have received your first dose of vaccine and you are too late to take the second, don’t panic. A study published by the University of Oxford on Monday June 28, 2021, shows that far from affecting the effectiveness of the vaccine, an interval of up to 45 weeks between the two doses of AstraZeneca improved the immune response to the virus.

Researchers have also shown thata third dose is more interesting if it is taken more than six months after the second. This would cause a sharp increase in the immune response against Covid-19 and its variants.

Combination with Pfizer vaccine

“It should be a reassuring news for countries with less vaccine supply, which could worry about delays in second-dose supply to their populations ”commented Professor Andrew Pollard, director of the Oxford Vaccine Group which developed the vaccine with the Anglo-Swedish pharmaceutical group.

It had to be thought about, but according to the results of another study conducted by the University of Oxford, a mixed vaccination may be even more effective. Indeed, By combining a dose of AstraZeneca vaccine and a dose of Pfizer vaccine, injected four weeks apart, a strong immune response is observed.