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Article
Biochemistry & Molecular Biology
Wilfredo F. Garcia-Beltran et al.
Summary: Recent surveillance has identified the emergence of the SARS-CoV-2 Omicron variant, which carries up to 36 mutations in the spike protein and has the potential to evade vaccine-induced immunity. This study found that individuals vaccinated with mRNA vaccines exhibited strong neutralization of the Omicron variant, while most vaccinees had weak neutralization. The study also revealed that the Omicron variant infects more efficiently than other tested variants.
Editorial Material
Medicine, General & Internal
Carlos del Rio et al.
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION
(2022)
Letter
Medicine, General & Internal
Wanwisa Dejnirattisai et al.
Article
Multidisciplinary Sciences
Juan Manuel Carreno et al.
Summary: The Omicron variant of SARS-CoV-2, first identified in South Africa and Botswana in November 2021, has rapidly spread globally with high transmissibility. It has an unprecedented number of mutations in its spike gene, leading to immune escape and reduced vaccine efficacy. The neutralizing and binding activity against Omicron varies among individuals with different vaccination and infection histories.
Article
Multidisciplinary Sciences
Raquel Viana et al.
Summary: The SARS-CoV-2 epidemic in southern Africa has experienced three distinct waves, driven by different variants. The recently identified Omicron variant has rapidly spread in South Africa and to numerous countries, raising global concern.
Article
Medicine, General & Internal
Nick Andrews et al.
Summary: A study conducted in England showed that vaccines against SARS-CoV-2 provide high protection against hospitalization and death from Covid-19 at 20 weeks or more after vaccination. However, the effectiveness of the vaccines decreases over time, especially in individuals aged 65 and older and those with underlying risk factors.
NEW ENGLAND JOURNAL OF MEDICINE
(2022)
Article
Multidisciplinary Sciences
Peter B. Gilbert et al.
Summary: In the COVE phase 3 clinical trial, neutralizing and binding antibodies were measured in vaccine recipients to determine their correlation with COVID-19 risk and vaccine efficacy. The results showed that these immune markers were inversely associated with COVID-19 risk and directly associated with vaccine efficacy. Postvaccination neutralization titers of 10, 100, and 1000 correlated with estimated vaccine efficacies of 78%, 91%, and 96% respectively.
Letter
Medicine, General & Internal
Alicia T. Widge et al.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Biochemistry & Molecular Biology
Aurelien Sokal et al.
Summary: Memory B cells play a crucial role in host defense against SARS-CoV-2, with distinct B cell clone responses to the virus contributing to long-lasting immune protection. The study also highlights the significance of somatic mutations in the variable region genes of memory B cells over time, indicating continued maturation and long-term immune memory post-infection.
News Item
Multidisciplinary Sciences
Heidi Ledford
Summary: As cases of the coronavirus variant continue to spread, researchers are eagerly awaiting crucial data on the severity of the disease to assist countries in planning their response.
Article
Medicine, General & Internal
Merryn Voysey et al.
Summary: The AZD1222 vaccine has been approved for emergency use in the UK with an interval of 4-12 weeks between doses. Analysis shows that the vaccine is efficacious with two doses and provides immunoprotection after the first dose before the second dose is administered.
Article
Multidisciplinary Sciences
Rishi R. Goel et al.
Summary: This study found that immune memory to SARS-CoV-2 and its variants remains robust for at least 6 months after mRNA vaccination, with antibodies declining but still detectable in most individuals. mRNA vaccines also induced functional memory B cells and antigen-specific T cells, with recall responses primarily increasing antibody levels in individuals with preexisting immunity.
News Item
Medicine, General & Internal
Bryan Christie
BMJ-BRITISH MEDICAL JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Wanwisa Dejnirattisai et al.
Summary: Ending the SARS-CoV-2 pandemic requires global vaccination. New virus strains with mutations impact antibody responses, but some variants are less resistant than others. A monoclonal antibody can neutralize different variants and partially restore neutralization potency for other public antibodies.
Article
Microbiology
Venkata Viswanadh Edara et al.
Summary: Despite reduced antibody titers against the B.1.351 variant, sera from infected and vaccinated individuals containing polyclonal antibodies to the spike protein could still neutralize SARS-CoV-2 B.1.351, suggesting that protective humoral immunity may be retained against this variant.
CELL HOST & MICROBE
(2021)
Letter
Medicine, General & Internal
Xiaoying Shen et al.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Medicine, General & Internal
S. A. Madhi et al.
Summary: The ChAdOx1 nCoV-19 vaccine did not provide significant protection against mild-to-moderate Covid-19 caused by the B.1.351 variant, with an efficacy of 10.4%. The incidence of serious adverse events was balanced between the vaccine and placebo groups.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Medicine, General & Internal
V. Shinde et al.
Summary: The NVX-CoV2373 vaccine showed efficacy in preventing Covid-19, with higher vaccine efficacy observed among HIV-negative participants. Most infections were caused by the B.1.351 variant.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Medicine, General & Internal
Xinxue Liu et al.
Summary: Heterologous prime-boost COVID-19 vaccine schedules could facilitate mass immunisation, with ChAd/BNT showing non-inferior immunogenicity compared to ChAd/ChAd, but BNT/ChAd did not demonstrate non-inferiority to BNT/BNT. The results support flexibility in using heterologous prime-boost vaccination with ChAd and BNT COVID-19 vaccines.
Article
Medicine, General & Internal
Alberto M. Borobia et al.
Summary: To date, there are no immunological data on COVID-19 heterologous vaccination schedules in humans. This study evaluated the immunogenicity and reactogenicity of administering BNT162b2 as a second dose in individuals primed with ChAdOx1-S. The results showed that BNT162b2 induced a robust immune response in individuals prime vaccinated with ChAdOx1-S, with an acceptable and manageable reactogenicity profile.
Article
Medicine, General & Internal
Amy Flaxman et al.
Summary: The study shows that an extended interval before the second dose of the AstraZeneca vaccine leads to increased antibody titres, while a third dose significantly boosts antibody levels and enhances T-cell responses.
Letter
Medicine, General & Internal
Nassim Kamar et al.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Letter
Medicine, General & Internal
Johan Normark et al.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Medicine, General & Internal
Yinon M. Bar-On et al.
Summary: After receiving a third dose of the BNT162b2 mRNA vaccine, Israeli residents aged 60 and above who had previously received two doses of the vaccine saw significantly lower rates of confirmed Covid-19 infection and severe illness compared to those who did not receive a booster shot, indicating the effectiveness of the booster dose in reducing infection and severe illness.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Biochemistry & Molecular Biology
Alba Grifoni et al.
Article
Infectious Diseases
B. Meyer et al.
CLINICAL MICROBIOLOGY AND INFECTION
(2020)
Review
Immunology
Nicole Baumgarth et al.
JOURNAL OF IMMUNOLOGY
(2020)
Article
Medicine, Research & Experimental
Arne Sattler et al.
JOURNAL OF CLINICAL INVESTIGATION
(2020)
