Oxford-AstraZeneca Covid vaccine is safe and effective, researchers

Oxford-AstraZeneca Covid vaccine is safe and effective, researchers

A test tube labelled vaccine is seen in front of AstraZeneca logo in this illustration taken, September 9, 2020.Dado Ruvic | ReutersLONDON — The coronavirus vaccine developed by British pharmaceuticals giant AstraZeneca, in collaboration with the University of Oxford, is the first to have its late-stage trial results independently reviewed and published in a medical journal.The study published in The Lancet on Tuesday reiterated the trial findings for the vaccine which were shared a few weeks ago, that showed an average effectiveness of 70% in protecting against the coronavirus.It also confirmed the two dosage regimens used, with the two full doses showing 62% effectiveness and 90% efficacy shown with the half-then-full dose regimen.In a press conference on Tuesday, Dr. Sarah Gilbert, the Oxford vaccinology professor who led this coronavirus vaccine project, said it was a “really good day for the U.K., this is probably the best day we’ve had in 2020.””Not only today are we seeing the first rollout of NHS vaccinations against Covid-19, (but) from our side we are able to present to you our data in a full peer-review publication with all of the information that people have been asking us about,” she added.”And we now see that the vaccine is safe, it’s highly effective and we also know that it can be manufactured in large quantities and at a low price,” Gilbert said, adding that it is hoped the vaccine will receive regulatory approval “in the coming weeks.”The interim results from the phase three trials of the Oxford-AstraZeneca vaccine were published in The Lancet medical journal. Peer-reviewed means that articles or studies are reviewed by other experts in the field before being published, acting as another quality control measure for the findings.Trial age groupsTrial data, running up to Nov. 4, was analyzed from 23,745 adult participants in the U.K., Brazil and South Africa. Some 82% of the trial participants were aged 18 to 55.People aged 56 years and over were recruited to take part later on. The University of Oxford said the effectiveness of the vaccine in this older age group could not yet be assessed but would be in future analyses after it had accrued more data.The age groups tested in the trials had been a concern for Chief of the White House’s Operation Warp Speed, Moncef Slaoui, and others in the U.S., who have pointed out that the 90% efficacy rate was only shown for a lower risk group, which numbered 2,741 people below the age of 55. The vaccine was found to be safe, the Lancet publication said, with only 3 out of the 23,745 participants experiencing “serious adverse events that were possibly related to a vaccine,” over an average 3.4 months.All three have since recovered or are recovering and continue to be part of the trial.


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