Table 2.
An analogy of epidemiological features of SARS-CoV, MERS-CoV and SARS-CoV-2.
| Outbreaks | SARS-CoV | MERS-CoV | SARS-CoV-2 |
|---|---|---|---|
| Assessed R0 (Reproductive No.) |
1.4–5.5 | >1 | 2.2– 2.6 |
| Human to human transmission |
Nosocomial, aerosols, zoonotic, fecal-oral transmission | Aerosols, zoonotic, respiratory, nosocomial, limited human-to-human transmission |
Close contact, nosocomial, zoonotic, aerosols transmission |
| Incubation phase (Days) | 4.6 | 5.2 | 6.4 |
| Primary host | Chinese horseshoe bats | Bats | Bats |
| Secondary host | Masked palm civets | Camels | Pangolins |
| Tertiary host | Human beings | Human beings | Human beings |