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A single BNT162b2 mRNA dose elicits antibodies with Fc-mediated effector functions and boost pre-existing humoral and T cell responses

biorxiv. 2021-03; 
Alexandra Tauzin, Manon Nayrac, Mehdi Benlarbi, Shang Yu Gong, Romain Gasser, Guillaume Beaudoin-Bussières, Nathalie Brassard, Annemarie Laumaea, Dani Vézina, Jérémie Prévost, Sai Priya Anand, Catherine Bourassa, Gabrielle Gendron-Lepage, Halima Medjahed, Guillaume Goyette, Julia Niessl, Olivier Tastet, Laurie Gokool, Chantal Morrisseau, Pascale Arlotto, Leonidas Stamatatos, Andrew T McGuire, Catherine Larochelle, Pradeep Uchil, Maolin Lu, Walther Mothes, Gaston De Serres, Sandrine Moreira, Michel Roger, Jonathan Richard, Valérie Martel-Laferrière, Ralf Duerr, Cécile Tremblay, Daniel E Kaufmann, Andrés Finzi
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Recombinant Antibody Expression … after the first dose of vaccine with recombinant SARS-CoV-2 RBD protein. Anti-RBD antibody binding … the Spike of theB.1.1.7 variant was codon-optimized and synthesized by Genscript. … Get A Quote

摘要

The standard dosing of the Pfizer/BioNTech BNT162b2 mRNA vaccine validated in clinical trials includes two doses administered three weeks apart. While the decision by some public health authorities to space the doses because of limiting supply has raised concerns about vaccine efficacy, data indicate that a single dose is up to 90% effective starting 14 days after its administration. We analyzed humoral and T cells responses three weeks after a single dose of this mRNA vaccine. Despite the proven efficacy of the vaccine at this time point, no neutralizing activity were elicited in SARS-CoV-2 naïve individuals. However, we detected strong anti-receptor binding domain (RBD) and Spike antibodies with Fc-mediated ... More

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