Table 1.

Phylogenetic, pathogenetic and epidemiological characteristics of SARS-CoV-2, SARS-CoV and MERS-CoV

	Phylogenetic origin	Animal reservoir	Intermediate host	Receptor	Case fatality rate	R0
SARS-CoV-2	Clade I, cluster IIa	Bats	Unknown	Angiotensin-converting enzyme 2 (ACE2)	2.3% [25]	2–2.5 [18]
SARS-CoV	Clade I, cluster IIb	Bats	Palm civets	Angiotensin-converting enzyme 2 (ACE2)	9.5%	1.7–1.9
MERS-CoV	Clade II	Bats	Camels	Dipeptidyl peptidase 4 (DPP4)	34.4%	0.7