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A dose of the AstraZeneca COVID-19 vaccine followed by a dose of the Pfizer/BioNTech vaccine confers better protection against SARS-CoV-2 infection than two doses of the Pfizer vaccine, according to a study in healthcare workers published in Nature.

https://www.nature.com/articles/s41586-021-04120-y?utm_source=twt_nat&utm_medium=social&utm_campaign=nature

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