mRNA vaccine-elicited antibodies to SARS-CoV-2 and circulating variants.
Zijun Wang,Fabian Schmidt,Yiska Weisblum,Frauke Muecksch,Christopher O. Barnes,Shlomo Finkin,Dennis Schaefer-Babajew,Melissa Cipolla,Christian Gaebler,Jenna Ariel Lieberman,Thiago Y. Oliveira,Zhi Yang,Morgan E. Abernathy,Kathryn E. Huey-Tubman,Arlene Hurley,Martina Turroja,Kamille A. West,Kristie Gordon,Katrina G. Millard,Victor A. Ramos,Justin Da Silva,Jianliang Xu,Robert A. Colbert,Roshni Patel,Juan Dizon,Cecille Unson-O'Brien,Irina Shimeliovich,Anna Gazumyan,Marina Caskey,Pamela J. Bjorkman,Rafael Casellas,Theodora Hatziioannou,Paul D. Bieniasz,Paul D. Bieniasz,Michel C. Nussenzweig,Michel C. Nussenzweig +35 more
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This paper reported on the antibody and memory B-cell responses of a cohort of 20 volunteers who received the Moderna (mRNA-1273) or Pfizer-BioNTech (BNT162b2) vaccine against SARS-CoV-2.Abstract:
Here we report on the antibody and memory B cell responses of a cohort of 20 volunteers who received the Moderna (mRNA-1273) or Pfizer–BioNTech (BNT162b2) vaccine against SARS-CoV-21–4 Eight weeks after the second injection of vaccine, volunteers showed high levels of IgM and IgG anti-SARS-CoV-2 spike protein (S) and receptor-binding-domain (RBD) binding titre Moreover, the plasma neutralizing activity and relative numbers of RBD-specific memory B cells of vaccinated volunteers were equivalent to those of individuals who had recovered from natural infection5,6 However, activity against SARS-CoV-2 variants that encode E484K-, N501Y- or K417N/E484K/N501-mutant S was reduced by a small—but significant—margin The monoclonal antibodies elicited by the vaccines potently neutralize SARS-CoV-2, and target a number of different RBD epitopes in common with monoclonal antibodies isolated from infected donors5–8 However, neutralization by 14 of the 17 most-potent monoclonal antibodies that we tested was reduced or abolished by the K417N, E484K or N501Y mutation Notably, these mutations were selected when we cultured recombinant vesicular stomatitis virus expressing SARS-CoV-2 S in the presence of the monoclonal antibodies elicited by the vaccines Together, these results suggest that the monoclonal antibodies in clinical use should be tested against newly arising variants, and that mRNA vaccines may need to be updated periodically to avoid a potential loss of clinical efficacy The Moderna (mRNA-1273) and Pfizer–BioNTech (BNT162b2) vaccines elicit anti-RBD antibodies similar to those elicited through natural infection with SARS-CoV-2, but their potent neutralizing activity was reduced or abolished by new viral variants of concernread more
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Outcome of SARS-CoV-2 variant breakthrough infection in fully immunized solid organ transplant recipients
TL;DR: In this paper , the authors describe a case series of four fully vaccinated solid organ transplant recipients who developed SARS-CoV-2 variants of concern breakthrough infections and two patients were infected with Alpha variant and had severe pneumonia requiring intensive care admission and ventilatory support.
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Effects of Covid-19 vaccination on different semen parameters
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Clinical challenges of SARS-CoV-2 variants (Review)
TL;DR: In the process of adapting to the human body, SARS-CoV-2 is expected to undergo evolution to become more contagious but less deadly.
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Design of the SARS-CoV-2 RBD vaccine antigen improves neutralizing antibody response
Dickey Th,Wanhu Tang,Brandi Butler,Ouahes T,Sachy Orr-Gonzalez,Nichole D. Salinas,Lynn Lambert,Niraj H. Tolia +7 more
TL;DR: In this paper, the receptor binding domain (RBD) of the SARS-CoV-2 spike protein is the primary target of neutralizing antibodies and is a component of almost all vaccine candidates.
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A new SARS-CoV-2 variant with high lethality poorly detected by RT-PCR on nasopharyngeal samples: an observational study
TL;DR: In this paper , the authors report a nosocomial outbreak of COVID-19 cases related to a new variant, B.1.616, which is poorly detected by RT-PCR on nasopharyngeal samples and is associated with high lethality.
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Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine.
Fernando P. Polack,Stephen J. Thomas,Nicholas Kitchin,Judith Absalon,Alejandra Gurtman,Stephen Lockhart,John L. Perez,Gonzalo Pérez Marc,Edson D. Moreira,Cristiano Zerbini,Ruth Bailey,Kena A. Swanson,Satrajit Roychoudhury,Kenneth Koury,Ping Li,Warren Kalina,David A. Cooper,Robert W. Frenck,Laura L. Hammitt,Özlem Türeci,Haylene Nell,Axel Schaefer,Serhat Ünal,Dina B. Tresnan,Susan Mather,Philip R. Dormitzer,Ugur Sahin,Kathrin U. Jansen,William C. Gruber +28 more
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