Abstract The diagnosis of COVID-19 relies on the direct detection of SARS-CoV-2 RNA in respiratory specimens by RT-PCR. The pandemic spread of the disease caused an imbalance between demand and supply of materials and reagents needed for diagnostic purposes including swab sets. In a comparative effectiveness study. we conducted serial follow-up swabs in hospitalized laboratory-confirm... https://johnsmustangs.shop/product-category/collections/