Table 1.

Comparative analysis of biological features of SARS-CoV and SARS-CoV-2.

Features	SARS-CoV	SARS-CoV-2	Reference
Emergence date	November 2002	December 2019	[37], [79], [80], [81]
Area of emergence	Guangdong, China	Wuhan, China
Date of fully controlled	July 2003	Not controlled yet
Key hosts	Bat, palm civets and Raccon dogs	Bat	[22], [82], [83]
Number of countries infected	26	109	[84]
Entry receptor in humans	ACE2 receptor	ACE2 receptor	[22], [55], [85]
Sign and symptoms	fever, malaise, myalgia, headache, diarrhoea, shivering, cough and shortness of breath	Cough, fever and shortness of breath	[12], [23], [85]
Disease caused	SARS, ARDS	SARS, COVID-19	[85], [86]
Total infected patients	8098	123882	[84]
Total recovered patients	7322	67051
Total died patients	776 (9.6% mortality rate)	4473 (3.61% mortality rate)