Tracking the Initial Diffusion of SARS-CoV-2 Omicron Variant in Italy by RT-PCR and Comparison with Alpha and Delta Variants Spreading

Caputo, V; Calvino, G; Strafella, C; Termine, A; Fabrizio, C; Trastulli, G; Ingrascì, A; Peconi, C; Bardini, S; Rossini, A; Salvia, A; Borsellino, G; Battistini, L; Caltagirone, C; Cascella, R; Giardina, E