. 2021 May 29;191(2):519–528. doi: 10.1007/s11845-021-02653-9

Table 1.

A comparison of the confirmed cases worldwide, casualties, fatality rate and reproductive number (R number) of SARS-CoV, MERS-CoV and SARS-CoV-2

Coronavirus	Confirmed cases	Casualties	Fatality rate	R number	Timeframe	Reference
SARS-CoV	8,422	916	10.87%	0.95	2002–2003 2004–2004	[7, 9]
MERS-CoV	2,581	935	36%	0.91	2012–Jan 2021	[7, 8]
SARS-CoV-2	127,349,248	2,787,593	2.2%	2.87	Dec 2019–Mar 2021	[2, 6]

Coronavirus

Confirmed cases

Casualties

Fatality rate

R number

Timeframe

Reference

SARS-CoV

8,422

916

10.87%

0.95

2002–2003

2004–2004

[7, 9]

MERS-CoV

2,581

935

36%

0.91

2012–Jan 2021

[7, 8]

SARS-CoV-2

127,349,248

2,787,593

2.2%

2.87

Dec 2019–Mar 2021

[2, 6]