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Potent neutralizing antibodies from COVID-19 patients define multiple targets of vulnerability.

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TLDR
It is shown that the patients had strong immune responses against the viral spike protein, a complex that binds to receptors on the host cell, and monoclonal antibodies isolated here are promising candidates for COVID-19 treatment and prevention.
Abstract
The rapid spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has had a large impact on global health, travel, and economy. Therefore, preventative and therapeutic measures are urgently needed. Here, we isolated monoclonal antibodies from three convalescent coronavirus disease 2019 (COVID-19) patients using a SARS-CoV-2 stabilized prefusion spike protein. These antibodies had low levels of somatic hypermutation and showed a strong enrichment in VH1-69, VH3-30-3, and VH1-24 gene usage. A subset of the antibodies was able to potently inhibit authentic SARS-CoV-2 infection at a concentration as low as 0.007 micrograms per milliliter. Competition and electron microscopy studies illustrate that the SARS-CoV-2 spike protein contains multiple distinct antigenic sites, including several receptor-binding domain (RBD) epitopes as well as non-RBD epitopes. In addition to providing guidance for vaccine design, the antibodies described here are promising candidates for COVID-19 treatment and prevention.

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Pathophysiology, Transmission, Diagnosis, and Treatment of Coronavirus Disease 2019 (COVID-19): A Review.

TL;DR: This review discusses current evidence regarding the pathophysiology, transmission, diagnosis, and management of COVID-19, the novel severe acute respiratory syndrome coronavirus 2 pandemic that has caused a worldwide sudden and substantial increase in hospitalizations for pneumonia with multiorgan disease.
References
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Journal ArticleDOI

Preliminary Identification of Potential Vaccine Targets for the COVID-19 Coronavirus (SARS-CoV-2) Based on SARS-CoV Immunological Studies.

TL;DR: This study identified a set of B cell and T cell epitopes derived from the spike (S) and nucleocapsid (N) proteins that map identically to SARS-CoV-2 proteins, providing a screened set of epitopes that can help guide experimental efforts towards the development of vaccines against this novel virus.
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Efficient generation of monoclonal antibodies from single human B cells by single cell RT-PCR and expression vector cloning

TL;DR: The method to clone and express human monoclonal antibodies is unbiased, highly efficient, requires only small cell numbers and the recombinant antibodies allow direct conclusions on the frequency of specific human B cells in a diverse repertoire.
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A human monoclonal antibody blocking SARS-CoV-2 infection.

TL;DR: A human monoclonal antibody is reported capable of neutralizing both authentic SARS-CoV and SARS -CoV-2 by targeting a common epitope on these viruses.
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Immunogenicity and structures of a rationally designed prefusion MERS-CoV spike antigen

TL;DR: An engineering strategy for stabilization of soluble S proteins in the prefusion conformation is described, which results in greatly increased expression, conformational homogeneity, and elicitation of potent antibody responses, and an engineered immunogen is able to elicit high neutralizing antibody titers against MERS-CoV.
Journal ArticleDOI

Appion: an integrated, database-driven pipeline to facilitate EM image processing.

TL;DR: The vision for this technique is to provide a straightforward manner in which users can proceed from raw data to a reliable 3D reconstruction through a pipeline that both facilitates management of the processing steps and makes the results at each step more transparent.
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How successful are antibody infusions for Covid?

In addition to providing guidance for vaccine design, the antibodies described here are promising candidates for COVID-19 treatment and prevention.