Riccò M, Ranzieri S, Peruzzi S, et al. RT-qPCR assays based on saliva rather than on nasopharyngeal swabs are possible but should be interpreted with caution: results from a systematic review and meta-analysis.: Diagnosis of SARS-CoV-2 through salivary fluids. Acta Biomed. 2020;91(3):e2020025. doi:10.23750/abm.v91i3.10020