Science

Should we be concerned about the side effects of Pfizer / BioNTech and AstraZeneca vaccines?

After the United Kingdom at the beginning of the week, the United States in turn is preparing to launch a large-scale vaccination campaign. The American Medicines Agency (FDA) has just issued emergency authorization for the vaccine developed by Pfizer and BioNTech laboratories. Across the Channel, many of the first Britons to have received an injection reported the occurrence of mild side effects. Two caregivers, with a history of allergies, also suffered anaphylactic shock. But do we really have to worry about it?

The vaccine data from AstraZeneca and Pfizer / BioNTech were released the same week. For the vaccine developed by the German-American duo, the results appeared in the leading American medical journal The New England Journal of Medicine. An FDA report released Wednesday also sheds light on how the clinical trials went. We learn that more than 80% of people vaccinated, or half of 43,448 volunteers who participated in the study, mentioned pain at the injection site.

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