How does the COVID-19 vaccine work?

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How does the COVID-19 vaccine work? Find out everything you need to know about the Pfizer-BioNtech Vaccine The mega vaccination operation against Covid-19 in Portugal began on December 27, with the administration of the first batch of vaccines, with 9,750 doses of the vaccine developed by Pfizer’s collaboration with BioNTech. This was the first vaccine…

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