Rapid antigenic test (TRA) versus RT-PCR: Experience of CHU IBN ROCHD Casablanca

• Ag-RDTs have a good specificity varying from 93.2 to 100% depending on the kits in comparison with RT-PCR. • In our study, the specificity of the BIOSENSOR® test was 100% and the sensitivity was 47.17%. • This drop of the specificity is explained by the decrease of the viral load with the progression of the infection.