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. 2021 May 27;120:S6–S18. doi: 10.1016/j.jfma.2021.05.022

Table 1.

Comparison between SARS, MERS, COVID-19.

Disease SARS MERS COVID-19
Year of outbreak 2002–2003 2012–2015 2019∼
Pathogen SARS-CoV-1 MERS-CoV SARS-CoV-2
Incubation period(days) 4.7132
95% CI: 4.3–5.1
5.8132
95% CI: 5.0–6.5
5.324
95% CI: 4.0–6.9
Infectious period(days) 8.4133
95% CI: 3-14
12.6134
95% CI: 12.1–13.1
7.024
95% CI: 4.5–10.4
Infection at incubation period No No Yes
Reproductive number 3.0135 2.6136 2.844
Case-fatality rate 27.0%15 32.1%12 2.1%137
Anti-therapy No No Yes
Vaccine No No Yes