In the UK, the effectiveness of using two different vaccines for vaccination against coronavirus is being tested. The aim is to establish how much the degree of protection in this case will differ in comparison with the usual administration of two doses of the same vaccine.
According to the Global News, if the results are positive, this can help alleviate supply chain problems and increase immunity resistance in vaccinated people, especially to protect the population from new strains of COVID-19.
The research is conducted by the Oxford Vaccine Group. Earlier on its website, it explained that some of the volunteers would get the first dose of AstraZeneca vaccine, and some would get Pfizer/BioNTech. And after that, in a few weeks, half would get a second dose of the same vaccine, and the rest would get another one.
Is it safe to combine drugs when vaccinating against coronavirus?
According to Isaac Bogoch, Associate Professor at the University of Toronto (Canada) teaching Infectious Diseases, at the moment it is not worth mixing vaccines against COVID-19, since there is no data for analysis yet. This is a "smart idea," he says, and can be useful if one type of vaccine is in short supply.
At the same time, an Infectious Disease Physician at Regina General Hospital and an Associate Professor at the University of Saskatchewan (Canada) Wong also said that there is still little data for analysis. According to the CBC, studies may show that it is safe to mix several vaccines, but in his opinion it is "unlikely."
"There is no clear evidence that you can mix and match them properly, and we would not recommend that," Wong said.
Also, according to Dana Mazo, hospital epidemiologist and assistant professor of medicine at Mount Sinai Hospital in New York, AstraZeneca and Pfizer-BioNTech vaccines use two different technologies to protect against COVID-19 (the first is mRNA and the second is adenovirus vector technology). According to the Healthline, she said that in some cases, one type of vaccine can improve the effectiveness of another.
Context. Previously, 
described the main fakes about the coronavirus vaccination and tried to refute them.
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