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A man who boosted his Pfizer COVID-19 vaccine with a shot from Moderna said his side effects were a 'little more severe' the third time round - Yahoo Movies Canada
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6/19/21 at 5:00pm
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Business Insider
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Hilary Brueck
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Scientists are researching whether mixing and matching COVID-19 shots from Pfizer, Moderna, and Johnson & Johnson is safe and effective.
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https://www.businessinsider.com/booster-vaccine-trial-mix-and-match-shots-pfizer-moderna-jandj-2021-6
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