Roy Vallejo, EmiliaFernández De Córdoba-Oñate, SaraDelgado-Wicke, PabloTriguero-Martínez, AnaMontes, NuriaCarracedo-Rodríguez, RosaZurita-Cruz, NellyMarcos-Jiménez, AnaLamana Domínguez, AmaliaGalván-Román, José MaríaVillapalos García, GonzaloZubiaur, PabloCiudad, MarianelaRabes, LauraRodríguez, CarlosVilla, AlmudenaÁlvarez Rodríguez, JesúsMarcos, CelesteHernando, JuliaDíaz-Fernández, PaulaAbad, FranciscoSantos, Ignacio de losSanz Sanz, MartaRodríguez Serrano, DiegoGarcía-Vicuña, RosarioSuárez Fernández, CarmenPérez Gomáriz, Rosa MaríaMuñoz-Calleja, CeciliaFernández-Ruiz, ElenaGonzález-Álvaro, IsidoroCardeñoso, Laura2024-01-202024-01-202023Roy-Vallejo, Emilia, et al. «Occurrence of SARS-CoV-2 viremia is associated with genetic variants of genes related to COVID-19 pathogenesis». Frontiers in Medicine, vol. 10, septiembre de 2023, p. 1215246. https://doi.org/10.3389/fmed.2023.1215246.2296-858X10.3389/fmed.2023.1215246https://hdl.handle.net/20.500.14352/94195This study was funded with grants: “Fondos Supera COVID19” by Banco Santander and CRUE to CSF, RG-V, CM-C, and RPG; RD21/0002/0027, PI18/0371 and PI21/00526 to IG-Á, and PI19/00096 to EF-R from Ministerio de Economía y Competitividad (Instituto de Salud Carlos III) and co-funded by European regional development fund (ERDF) “A way to make Europe”; and co-financed by the Community of Madrid through the Covid 2019 Aid. The work of ER-V has been funded by a Rio-Hortega grant CM19/00149 from the Ministerio de Economía y Competitividad (Instituto de Salud Carlos III) and co-funded by The European Regional Development Fund (ERDF) “A way to make Europe.” GVG is co-financed by Instituto de Salud Carlos III (ISCIII) and the European Social Fund (PFIS predoctoral grant, number FI20/00090). PZ is financed by Universidad Autónoma de Madrid, Margarita Salas contract, grants for the requalification of the Spanish university system.Introduction: SARS-CoV-2 viral load has been related to COVID-19 severity. The main aim of this study was to evaluate the relationship between SARS-CoV-2 viremia and SNPs in genes previously studied by our group as predictors of COVID-19 severity. Materials and methods: Retrospective observational study including 340 patients hospitalized for COVID-19 in the University Hospital La Princesa between March 2020 and December 2021, with at least one viremia determination. Positive viremia was considered when viral load was above the quantifiable threshold (20 copies/ml). A total of 38 SNPs were genotyped. To study their association with viremia a multivariate logistic regression was performed. Results: The mean age of the studied population was 64.5  years (SD 16.6), 60.9% patients were male and 79.4% white non-Hispanic. Only 126 patients (37.1%) had at least one positive viremia. After adjustment by confounders, the presence of the minor alleles of rs2071746 (HMOX1; T/T genotype OR 9.9 pengjournal articlehttps://doi.org/10.3389/fmed.2023.1215246https://www.frontiersin.org/articles/10.3389/fmed.2023.1215246/full#supplementary-materialopen access616:578.834SARS-CoV-2ViremiaCOVID-19Single nucleotide polymorphism (SNPs)Genetic variantsEnfermedades infecciosas2420.08 Virus Respiratorios