Severe respiratory syndrome coronavirus-2 (SARS-CoV-2) is a novel, highly transmissible betacoronavirus that caused pandemic Coronavirus Disease 2019 (COVID-19) [1]. Outbreaks occurred worldwide, including Italy, where the number of infections was exceptionally high in northern regions [2]. Among betacoronaviruses, SARS-CoV-2 is the third virus causing fatal severe human respiratory disease after SARS-CoV and Middle East respiratory syndrome coronavirus (MERS-CoV) [1].