RENBP and COVID-19: Of the 2882 Ag-RDT analyses included in the study, 2086 tests were performed with TR DPP® COVID-19 – Ag - Bio-Manguinhos (Instituto de Tecnologia em Imunobiológicos ‒ Bio-Manguinhos/Fiocruz, Rio de Janeiro, Brazil), between January and June 2022, while 796 tests were performed with the IBMP TR Covid Ag kit (Instituto de Biologia Molecular do Paraná, Curitiba, Brazil), between January and April 2022.