Coronavirus disease 2019 (COVID-19) has created an emergency of epic proportions. While a vaccine may be forthcoming, this is not guaranteed, as discussed herein. The potential problems and ominous signs include (1) lung injury that developed in animals given an experimental vaccine for the severe acute respiratory syndrome coronavirus (SARS-CoV)-1; (2) a perversion of adaptive immune responses called antibody-dependent enhancement of infection that occurs in SARS-CoV-1 and that may occur in people vaccinated for COVID-19; (3) the frequent and recurrent infections that are caused by respiratory coronaviruses; and (4) the appearance of mutations in SARS-CoV-2 proteins, which raise the specter of vaccine escape mutants. Because success is uncertain, alternatives to vaccines need to be vigorously pursued during this critical moment in the pandemic. Alternatives include (1) engineered monoclonal antibodies that do not cause antibody-dependent enhancement; (2) cocktails of antiviral drugs and inhibitors of the cellular proteins required for SARS-CoV-2 replication; (3) interferons; and (4) anticoagulants, antioxidants, and immune modulators. To organize and coordinate the systematic investigation of existing therapies and new therapies (as they emerge), a Covid-19 clinical trials network is needed to provide (1) robust funding (on a par with vaccine funding) and administration; (2) an adaptive trial design committee to prioritize interventions and review results in real time; (3) a computer interface to facilitate patient enrollment, make data available to investigators, and present findings; (4) a practice guidelines study group; and (5) a mobile corps of COVID-19 experts available for rapid deployment, to assist local health care providers and enroll patients in trials as outbreaks occur. To combat the COVID-19 pandemic and future mass contagions, the network would be a cornerstone of a comprehensive infectious diseases research program.
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http://dx.doi.org/10.1002/hep4.1588 | DOI Listing |
Clin Immunol
January 2025
Immunology Department, Hospital Universitari Vall d'Hebron, Campus Vall d'Hebron, Barcelona, Spain; Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma Barcelona, Campus Vall d'Hebron and Campus Bellaterra, Barcelona, Spain; Cancer Genomics Group, Vall Hebron Institut Oncology (VHIO), Campus Vall d'Hebron, Barcelona, Spain. Electronic address:
Unlabelled: The antibody response to SARS-CoV-2 does not follow the immunoglobulin isotype pattern of primary responses, conflicting with the current interpretation of COVID-19.
Methods: Prospective cohort study of 191 SARS-CoV-2 infection cases and 44 controls from the second wave of COVID-19. The study stratified patients by severity and analyzed the trajectories of SARS-CoV-2 antibodies and multiple immune variables.
Cureus
December 2024
Health Data Science, Learning Health Society Institute, Nagoya, JPN.
Background Despite ongoing waves of Coronavirus disease 2019 (COVID-19) infections, including significant surges such as the 10th wave, understanding the impact of messenger RNA (mRNA) COVID-19 vaccination on infection risk and associated behavioral changes remains crucial. This study aims to urgently evaluate the effects of mRNA COVID-19 vaccination on COVID-19 infection rates and related behaviors among participants of the Yamato Project, which includes employees of Japanese small and medium-sized enterprises (SMEs). Methods A case-control study was conducted using data collected from a survey administered by the Japan Small and Medium Enterprise Management Council in December 2023.
View Article and Find Full Text PDFAntiviral Res
January 2025
Department of Microbiology and Immunology, State University of New York Upstate Medical University, Syracuse, NY 13210, USA; Institute for Global Health and Translational Sciences, State University of New York Upstate Medical University, Syracuse, NY 13210, USA. Electronic address:
Dengue virus (DENV) is a rapidly expanding infectious disease threat that causes an estimated 100 million symptomatic infections every year. A barrier to preventing DENV infections with traditional vaccines or prophylactic monoclonal antibody (mAb) therapies is the phenomenon of Antibody-Dependent Enhancement (ADE), wherein sub-neutralizing levels of DENV-specific IgG antibodies can enhance infection and pathogenesis rather than providing protection from disease. Fortunately, IgG is not the only antibody isotype capable of binding and neutralizing DENV, as DENV-specific IgA1 isotype mAbs can bind and neutralize DENV while without exhibiting any ADE activity.
View Article and Find Full Text PDFPathogens
December 2024
Department of Viral Infections, Research Institute for Microbial Diseases, Osaka University, Suita 565-0871, Japan.
Antibody-dependent enhancement (ADE) is a phenomenon in which antibodies enhance subsequent viral infections rather than preventing them. Sub-optimal levels of neutralizing antibodies in individuals infected with dengue virus are known to be associated with severe disease upon reinfection with a different dengue virus serotype. For Severe Acute Respiratory Syndrome Coronavirus type-2 infection, three types of ADE have been proposed: (1) Fc receptor-dependent ADE of infection in cells expressing Fc receptors, such as macrophages by anti-spike antibodies, (2) Fc receptor-independent ADE of infection in epithelial cells by anti-spike antibodies, and (3) Fc receptor-dependent ADE of cytokine production in cells expressing Fc receptors, such as macrophages by anti-nucleocapsid antibodies.
View Article and Find Full Text PDFOpen Forum Infect Dis
January 2025
Department of Microbiology and Immunology, State University of New York Upstate Medical University, Syracuse, New York, USA.
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