Wednesday, May 18

Mixing vaccines increases protection against COVID-19 | Digital Trends Spanish


The scientific community received preliminary good news this Monday, June 28, since A study of the University of Oxford indicated that the combination of vaccines is more effective in protecting against COVID-19.

The expert and project leader, Matthew Snape, specifically addressed the AstraZeneca and Pfizer mix and in any order of administration.

In the first run of the study, 830 volunteers were given one of four vaccine combinations. Some received two doses of Pfizer or AstraZeneca, which have been shown to be effective against Covid-19. Others received a dose of AstraZeneca, followed by a dose of Pfizer, or vice versa.

One of the downsides was adverse effects, as the researchers found that volunteers reported more chills, headaches and muscle pain than people receiving two doses of the same vaccine. But the secondary problems were short-lived.

What were the main conclusions ?: In the study, “they found that those who received two doses of Pfizer-BioNTech produced antibody levels approximately 10 times higher than those who received two doses of AstraZeneca. Volunteers who received Pfizer followed by AstraZeneca showed antibody levels approximately five times higher than those with two doses of AstraZeneca. And the volunteers who received AstraZeneca followed by Pfizer achieved antibody levels almost as high as those who received two doses of Pfizer.

Another very valuable point is that this work also found that the use of different vaccines produced a higher level of immune cells prepared to attack the coronavirus than the delivery of two doses of the same vaccine.

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