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      Characterization of humoral and SARS-CoV-2 specific T cell responses in people living with HIV

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          Abstract

          There is an urgent need to understand the nature of immune responses against SARS-CoV-2, to inform risk-mitigation strategies for people living with HIV (PLWH). Here we show that the majority of PLWH with ART suppressed HIV viral load, mount a detectable adaptive immune response to SARS-CoV-2. Humoral and SARS-CoV-2-specific T cell responses are comparable between HIV-positive and negative subjects and persist 5-7 months following predominately mild COVID-19 disease. T cell responses against Spike, Membrane and Nucleoprotein are the most prominent, with SARS-CoV-2-specific CD4 T cells outnumbering CD8 T cells. We further show that the overall magnitude of SARS-CoV-2-specific T cell responses relates to the size of the naive CD4 T cell pool and the CD4:CD8 ratio in PLWH. These findings suggest that inadequate immune reconstitution on ART, could hinder immune responses to SARS-CoV-2 with implications for the individual management and vaccine effectiveness in PLWH.

          Abstract

          Understanding the pathology and immunological response to SARS CoV2 infection in specific patient groups is essential for informing the scientific and clinical handling of infections within these patient populations. Here the authors characterise the adaptive immune response to SARS-CoV2 infection in people living with HIV.

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          Clinical Characteristics of Coronavirus Disease 2019 in China

          Abstract Background Since December 2019, when coronavirus disease 2019 (Covid-19) emerged in Wuhan city and rapidly spread throughout China, data have been needed on the clinical characteristics of the affected patients. Methods We extracted data regarding 1099 patients with laboratory-confirmed Covid-19 from 552 hospitals in 30 provinces, autonomous regions, and municipalities in mainland China through January 29, 2020. The primary composite end point was admission to an intensive care unit (ICU), the use of mechanical ventilation, or death. Results The median age of the patients was 47 years; 41.9% of the patients were female. The primary composite end point occurred in 67 patients (6.1%), including 5.0% who were admitted to the ICU, 2.3% who underwent invasive mechanical ventilation, and 1.4% who died. Only 1.9% of the patients had a history of direct contact with wildlife. Among nonresidents of Wuhan, 72.3% had contact with residents of Wuhan, including 31.3% who had visited the city. The most common symptoms were fever (43.8% on admission and 88.7% during hospitalization) and cough (67.8%). Diarrhea was uncommon (3.8%). The median incubation period was 4 days (interquartile range, 2 to 7). On admission, ground-glass opacity was the most common radiologic finding on chest computed tomography (CT) (56.4%). No radiographic or CT abnormality was found in 157 of 877 patients (17.9%) with nonsevere disease and in 5 of 173 patients (2.9%) with severe disease. Lymphocytopenia was present in 83.2% of the patients on admission. Conclusions During the first 2 months of the current outbreak, Covid-19 spread rapidly throughout China and caused varying degrees of illness. Patients often presented without fever, and many did not have abnormal radiologic findings. (Funded by the National Health Commission of China and others.)
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            Characteristics of and Important Lessons From the Coronavirus Disease 2019 (COVID-19) Outbreak in China: Summary of a Report of 72 314 Cases From the Chinese Center for Disease Control and Prevention

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              Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine

              Abstract Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and the resulting coronavirus disease 2019 (Covid-19) have afflicted tens of millions of people in a worldwide pandemic. Safe and effective vaccines are needed urgently. Methods In an ongoing multinational, placebo-controlled, observer-blinded, pivotal efficacy trial, we randomly assigned persons 16 years of age or older in a 1:1 ratio to receive two doses, 21 days apart, of either placebo or the BNT162b2 vaccine candidate (30 μg per dose). BNT162b2 is a lipid nanoparticle–formulated, nucleoside-modified RNA vaccine that encodes a prefusion stabilized, membrane-anchored SARS-CoV-2 full-length spike protein. The primary end points were efficacy of the vaccine against laboratory-confirmed Covid-19 and safety. Results A total of 43,548 participants underwent randomization, of whom 43,448 received injections: 21,720 with BNT162b2 and 21,728 with placebo. There were 8 cases of Covid-19 with onset at least 7 days after the second dose among participants assigned to receive BNT162b2 and 162 cases among those assigned to placebo; BNT162b2 was 95% effective in preventing Covid-19 (95% credible interval, 90.3 to 97.6). Similar vaccine efficacy (generally 90 to 100%) was observed across subgroups defined by age, sex, race, ethnicity, baseline body-mass index, and the presence of coexisting conditions. Among 10 cases of severe Covid-19 with onset after the first dose, 9 occurred in placebo recipients and 1 in a BNT162b2 recipient. The safety profile of BNT162b2 was characterized by short-term, mild-to-moderate pain at the injection site, fatigue, and headache. The incidence of serious adverse events was low and was similar in the vaccine and placebo groups. Conclusions A two-dose regimen of BNT162b2 conferred 95% protection against Covid-19 in persons 16 years of age or older. Safety over a median of 2 months was similar to that of other viral vaccines. (Funded by BioNTech and Pfizer; ClinicalTrials.gov number, NCT04368728.)
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                Author and article information

                Contributors
                l.mccoy@ucl.ac.uk
                Dimitra.peppa@ndm.ox.ac.uk
                Journal
                Nat Commun
                Nat Commun
                Nature Communications
                Nature Publishing Group UK (London )
                2041-1723
                5 October 2021
                5 October 2021
                2021
                : 12
                : 5839
                Affiliations
                [1 ]GRID grid.4991.5, ISNI 0000 0004 1936 8948, Nuffield Department of Clinical Medicine, , University of Oxford, ; Oxford, UK
                [2 ]GRID grid.83440.3b, ISNI 0000000121901201, Division of Infection and Immunity, , University College London, ; London, UK
                [3 ]GRID grid.451388.3, ISNI 0000 0004 1795 1830, Chromatin Structure and Mobile DNA Laboratory, , The Francis Crick Institute, ; London, UK
                [4 ]GRID grid.451388.3, ISNI 0000 0004 1795 1830, Signalling and Structural Biology Laboratory, , Francis Crick Institute, ; London, UK
                [5 ]GRID grid.511564.2, Mortimer Market Centre, Department of HIV, , CNWL NHS Trust, ; London, UK
                [6 ]GRID grid.83440.3b, ISNI 0000000121901201, Institute for Global Health UCL, ; London, UK
                [7 ]GRID grid.437485.9, ISNI 0000 0001 0439 3380, Royal Free London NHS Foundation Trust, ; London, UK
                [8 ]GRID grid.83440.3b, ISNI 0000000121901201, Department of Immunology, , Royal Free Campus, UCL, ; London, UK
                Author information
                http://orcid.org/0000-0002-6915-074X
                http://orcid.org/0000-0002-7164-8555
                http://orcid.org/0000-0003-1592-6028
                http://orcid.org/0000-0002-7834-6066
                http://orcid.org/0000-0001-7433-6357
                http://orcid.org/0000-0002-9091-9955
                http://orcid.org/0000-0002-0634-538X
                http://orcid.org/0000-0002-1379-1775
                http://orcid.org/0000-0001-5788-6998
                http://orcid.org/0000-0001-9503-7946
                http://orcid.org/0000-0002-9281-5471
                Article
                26137
                10.1038/s41467-021-26137-7
                8492866
                34611163
                e3b2e570-87f5-4cb0-b457-fe934f664075
                © The Author(s) 2021

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 8 March 2021
                : 17 September 2021
                Funding
                Funded by: FundRef https://doi.org/10.13039/501100000265, RCUK | Medical Research Council (MRC);
                Award ID: MR/M008614
                Award Recipient :
                Funded by: FundRef https://doi.org/10.13039/100000060, U.S. Department of Health & Human Services | NIH | National Institute of Allergy and Infectious Diseases (NIAID);
                Award ID: R01AI55182
                Award Recipient :
                Categories
                Article
                Custom metadata
                © The Author(s) 2021

                Uncategorized
                immunological memory,antibodies,viral infection,sars-cov-2
                Uncategorized
                immunological memory, antibodies, viral infection, sars-cov-2

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