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A study in South Korea, published by Reuters, showed that vaccination with one dose of AstraZeneca and one dose of Pfizer increases the level of antibodies in the body six times compared to two doses of AstraZeneca only.
499 medical staff participated in the study, of which 100 received double doses, 200 received two doses of Pfizer Biontech vaccine and the rest received two doses of AstraZeneca vaccine.
All had antibodies that prevent the virus from entering cells and reproducing itself, and the study showed that the amounts of antibodies formed in the group that received a double vaccination were similar to the amounts formed in the group that received two doses of Pfizer vaccine.
A British study last month showed similar results. These data support the decision of several countries to offer alternatives to the AstraZeneca vaccine in second dose, after having linked this vaccine to the occurrence of blood clots.
And a professor of epidemiology at the University of the Arabian Gulf in Bahrain, Dr Moez Bakhit, said in a previous interview with Al-Hurra that, from a scientific point of view, “there is no problem with mix the vaccines or take a booster dose of another vaccine.
Bakhit added: “There is no consequence for this. The Chinese vaccine is different from Pfizer.”
He explained that Chinese vaccines depend on dead viral cells, through which the immune system can confront the virus. While Pfizer relies on the technology of messenger RNA, or what is called “mRNA”.
He stressed that it is permissible to confuse vaccines from a biological and scientific point of view, and that “it can strengthen immunity”.
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