Notation | Definition | Value |
| disease transmission rate for primary strain | 0.75 per day per person (assumed) |
| disease transmission rate for secondary strain | 0.50 per day per person (assumed) |
| recovery rate for primary strain | 0.30 per day (assumed) |
| recovery rate for secondary strain | 0.20 per day (assumed) |
| mutation rate from primary to secondary strain (when considered) | 0.05 (5%) (assumed) |
| effectiveness of vaccination against primary strain | (assumed) |
| effectiveness of vaccination against secondary strain | (assumed) |
| efficiency of self-protection (IDM) against primary strain | (assumed) |
| efficiency of self-protection (IDM) against secondary strain | (assumed) |
| selection parameter | 0.1 [1] [59] |