Use of saliva and RT-PCR screening for SARS-CoV-2 variants of concern: surveillance and monitoring - Zerbinati, Rodrigo Melim; Palmieri, Michelle; Schwab, Gabriela; Félix, Alvina Clara; Martinho, Herculano; Giannecchini, Simone; To, Kelvin Kai-Wang; Lindoso, Jose Angelo Lauletta; Romano, Camila Malta; Braz-Silva, Paulo Henrique (Journal of medical virology, 2022)