Omicron is a newly discovered variant virus of coronavirus disease 2019 and has spread rapidly around the world. Omicron has been defined as a variant of concern by the World Health Organization. Its epidemiology, pathogenic characteristics, clinical diagnosis, treatment, and prevention are still being observed and summarized, and in particular, there are few reports on the diagnosis and treatment of children with Omicron infection. This article introduces the influence of Omicron infection in children and its prevention, diagnosis, and treatment.
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http://dx.doi.org/10.7499/j.issn.1008-8830.2201001 | DOI Listing |
Hum Vaccin Immunother
December 2025
Research and Development, Infectious Disease, Moderna, Inc., Cambridge, MA, USA.
Safety, immunogenicity, and effectiveness of an mRNA-1273 50-μg booster were evaluated in adolescents (12-17 years), with and without pre-booster SARS-CoV-2 infection. Participants who had received the 2-dose mRNA-1273 100-µg primary series in the TeenCOVE trial (NCT04649151) were offered the mRNA-1273 50-μg booster. Primary objectives included safety and inference of effectiveness by establishing noninferiority of neutralizing antibody (nAb) responses after the booster compared with the nAb post-primary series of mRNA-1273 among young adults in COVE (NCT04470427).
View Article and Find Full Text PDFFront Immunol
January 2025
School of Public Health and Health Management, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China.
Introduction: The high percentage of Omicron breakthrough infection in vaccinees is an emerging problem, of which we have a limited understanding of the phenomenon.
Methods: We performed single-cell transcriptome coupled with T-cell/B-cell receptor (TCR/BCR) sequencing in 15 peripheral blood mononuclear cell (PBMC) samples from Omicron infection and naïve with booster vaccination.
Results: We found that after breakthrough infection, multiple cell clusters showed activation of the type I IFN pathway and widespread expression of Interferon-stimulated genes (ISGs); T and B lymphocytes exhibited antiviral and proinflammatory-related differentiation features with pseudo-time trajectories; and large TCR clonal expansions were concentrated in effector CD8 T cells, and clonal expansions of BCRs showed a preference for IGHV3.
Health Promot Pract
January 2025
University of Cincinnati, Cincinnati, OH, USA.
While most adolescents experience mild-COVID-19 infection, those with underlying medical conditions have an increased risk of severe health outcomes. Furthermore, compared with other pediatric populations, adolescents have experienced higher rates of COVID-19-associated hospitalization. COVID-19 vaccine decision-making in adolescents during COVID-19 surges is not well understood.
View Article and Find Full Text PDFBMC Musculoskelet Disord
January 2025
Department of Anesthesiology, General Hospital of Central Theater Command of PLA, Wuhan, China.
Objective: The aim of this study was to investigate the effect of SARS-CoV-2 Omicron BA. 5.2 (hereafter referred to as Omicron BA.
View Article and Find Full Text PDFNat Immunol
January 2025
Division of Gastroenterology, Hepatology and Nutrition, Boston Children's Hospital, Boston, MA, USA.
Viral variant and host vaccination status impact infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), yet how these factors shift cellular responses in the human nasal mucosa remains uncharacterized. We performed single-cell RNA sequencing (scRNA-seq) on nasopharyngeal swabs from vaccinated and unvaccinated adults with acute Delta and Omicron SARS-CoV-2 infections and integrated with data from acute infections with ancestral SARS-CoV-2. Patients with Delta and Omicron exhibited greater similarity in nasal cell composition driven by myeloid, T cell and SARS-CoV-2 cell subsets, which was distinct from that of ancestral cases.
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