1. Anon https://www.siemens-healthineers.com/en-in/laboratory-diagnostics/assays-by-diseases-conditions/infectious-disease-assays/cov2t-assay.
2. Anon https://www.diasorin.com/en/immunodiagnostic-solutions/clinical-areas/infectious-diseases/covid-19.
3. Anon https://www.fda.gov/media/137363/download.
4. Anon https://www.who.int/publications/m/item/WHO-BS-2020.2403.
5. Anon https://www.diasorin.com/sites/default/files/allegati_prodotti/liaisonr_sars-cov-2_trimerics_igg_assay_m0870004408_a_lr.pdf.