The study, which is not yet peer-reviewed, investigated the effectiveness of COVID-19 vaccines that use so-called mRNA technology against the Delta variant and the new, more infectious Omicron variant.Register now for FREE unlimited access to Reuters.comThe study was conducted by researchers at Denmark’s top infectious disease authority, Statens Serum Institut.The study confirms the findings of a recent British study, which also showed a rapid decline in protection against Omicron over time and an increase following a booster with Pfizer-BioNTech’s vaccine.
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