| Rating | Description | range |
| α | The rate at which the epidemic spreads | - |
| β | Time of onset of symptoms (incubation period) | 4 - 6 days |
| p | Proportion of unse confirmed cases | - |
| γ | Healing time for unredmified single cases (non-hospitalized) | 7 - 14 days |
| λ | Time to detect infectious diseases | 5 - 10 days |
| q | Time for infectious cures | 20 - 40 days |
| θ | Proportion of cures of confirmed cases | - |
| δ | Time of infections causing death | 14 - 50 days |