Lucia InchausteElif NurtopLissete Bautista MachicadoYanine Leigue RothShirley Lenz GonzalesMaria Luisa HerreraKatty Mina VillafanPedro Mamani MamaniMarcelo Ramos EspinozaJuan Carlos Pavel Suarez2026-03-222026-03-22202410.7554/elife.94475https://doi.org/10.7554/elife.94475https://andeanlibrary.org/handle/123456789/74829This study was supported by the French National Research Institute for Sustainable Development (IRD), the project EMERGEN-PRI #22275 of the ANRS I MIE (INSERM), and the European Union's Horizon 2020 research and innovation program (European Virus Archive Global, grant agreement No. 871029). The funders of the study had no role in study design, data collection, data analysis, data interpretation, or writing of the report.enSerologySeroprevalenceVirologyNeutralizationPopulationPandemicAntibodyVirusBiologySevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2)Improving SARS-CoV-2 variants monitoring in the absence of genomic surveillance capabilities: a serological study in Bolivian blood donors in October 2021 and June 2022article