Three different strains of CoV (Coronavirus) have crossed the species obstruction to cause fatal pneumonia in humans since the start of the 21st century: SARS-CoV (severe acute respiratory syndrome) (Drosten et al., 2003), MERS-CoV (Middle-East respiratory syndrome) (Zaki et al., 2012) and SARS-CoV-2 (causative agent of COVID-19) (Huang et al., 2020), first emerged in the Wuhan city, December 2019, in the province of Hubei, China, was isolated and sequenced in January 2020.