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We describe persistent circulation of SARS-CoV-2 Alpha variant in an immunosuppressed patient in France during February 2022. The virus had a new pattern of mutation accumulation. The ongoing circulation of previous variants of concern could lead to reemergence of variants with the potential to propagate future waves of infection.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9239896 | PMC |
http://dx.doi.org/10.3201/eid2807.220467 | DOI Listing |
Front Microbiol
August 2025
Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States.
Medical interventions, such as masks, were a cornerstone in mitigating the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Since 2019, the scientific community has increasingly focused on exploring avenues for pandemic prevention and preparedness to enhance responses to future viral outbreaks. One such area of interest explores the use of additives, such as silicon nitride (Si₃N₄), in masks to enhance the antiviral properties of personal protective equipment.
View Article and Find Full Text PDFFront Cell Infect Microbiol
September 2025
Universidad Autónoma de Nuevo León, Servicio y Departamento de Inmunología, Facultad de Medicina, Monterrey, NL, Mexico.
Natural killer (NK) cells are innate lymphocytes with cytotoxic activity against tumors and viruses. The pandemic of the coronavirus disease 2019 (COVID-19) has increased the investigation of their role in disease severity. However, their functional status and modulators remain controversial.
View Article and Find Full Text PDFBackgroundRAY1216 is an alpha-ketoamide-based peptide inhibitor of severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) major protease (M). This study evaluated the absorption, distribution, metabolism and excretion of [C]-labelled RAY1216 by oral administration.Research design and methodsThis phase Ι study was designed to assess the pharmacokinetics, mass balance and metabolic pathways in 6 healthy Chinese adult men after a single fasting oral administration of 240 mL (containing 400 mg/100 μCi) [C] RAY1216.
View Article and Find Full Text PDFPediatr Infect Dis J
September 2025
From the School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia.
Background: Obesity was a risk factor for severe COVID-19 in children during early outbreaks of ancestral SARS-CoV-2 and the Delta variant. However, the relationship between obesity and COVID-19 severity during the Omicron wave remains unclear.
Methods: This multicenter, observational study included polymerase chain r eaction-confirmed SARS-CoV-2-infected children and adolescents from Australia, Brazil, Italy, Portugal, Switzerland, Thailand, the United Kingdom and the United States hospitalized between January 1, 2020, and March 31, 2022.
Phys Chem Chem Phys
September 2025
School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
The COVID-19 pandemic remains a global health crisis, with successive SARS-CoV-2 variants exhibiting enhanced transmissibility and immune evasion. Notably, the Omicron variant harbors extensive mutations in the spike protein's receptor-binding domain (RBD), altering viral fitness. While temperature is a critical environmental factor modulating viral stability and transmission, its molecular-level effects on variant-specific RBD-human angiotensin-converting enzyme 2 (hACE2) interactions remain underexplored.
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