Persistent viral infectivity after 27 days from COVID-19 symptoms onset
Luisa Zupin, Francesco Fontana, Libera Clemente, Pierino Boschian-Bailo, Maurizio Ruscio, Sergio Crovella
Journal of Clinical Pathology Mar 2022, 75 (3) 211-214; DOI: 10.1136/jclinpath-2021-207394