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Astra-Pfizer COVID mixed vaccine “boosts antibodies”
New medical study from South Korea indicates that an injection of the AstraZeneca coronavirus vaccine, followed by an injection of the Pfizer-BioNTech vaccine, may increase some antibody levels six times compared to using just two injections of AstraZeneca instead. The Disease Control and Prevention Agency is following a similar study in the UK last month. The studies would support the decision of several countries to allow people who have received a single injection of AstraZeneca to use an alternative for their second dose after AstraZeneca has been linked to rare blood clots. This includes Canada, Italy and China – although the World Health Organization has warned against the practice, saying there is not enough data on the impact on health. The South Korean study specifically focused on the levels of the so-called “neutralizer”. antibodies, which prevent the coronavirus from entering cells and replicating itself.
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