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• W3128490024 abstract "Abstract SARS-CoV-2 transmission is uncontrolled in many parts of the world, compounded in some areas by higher transmission potential of the B1.1.7 variant now seen in 50 countries. It is unclear whether responses to SARS-CoV-2 vaccines based on the prototypic strain will be impacted by mutations found in B.1.1.7. Here we assessed immune responses following vaccination with mRNA-based vaccine BNT162b2. We measured neutralising antibody responses following a single immunization using pseudoviruses expressing the wild-type Spike protein or the 8 mutations found in the B.1.1.7 Spike protein. The vaccine sera exhibited a broad range of neutralizing titres against the wild-type pseudoviruses (<1:4 to 3449) that were reduced against B.1.1.7 variant by 3.85 fold (IQR 2.68-5.28). This reduction was also evident in sera from some convalescent patients. Decreased B.1.1.7 neutralization was also observed with monoclonal antibodies targeting the N-terminal domain (9 out of 10), the Receptor Binding Motif (RBM) (5 outof 29), but not in neutralizing mAbs binding outside the RBM. Introduction of the E484K mutation in a B.1.1.7 background led to a further loss of neutralizing activity by vaccine-elicited antibodies over that conferred by the B.1.1.7 mutations alone. Further work is needed to establish the impact of these observations on protective vaccine efficacy in the context of the evolving B.1.1.7 lineage that will likely acquire E484K." @default.
• W3128490024 created "2021-02-15" @default.
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• W3128490024 date "2021-01-29" @default.
• W3128490024 modified "2023-10-14" @default.
• W3128490024 title "SARS-CoV-2 B.1.1.7 escape from mRNA vaccine-elicited neutralizing antibodies" @default.
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• W3128490024 doi "https://doi.org/10.21203/rs.3.rs-156101/v1" @default.
• W3128490024 hasPublicationYear "2021" @default.
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