Table 3.
Estimated (fitted) parameter values and their 95% confidence intervals for the model (2.5)–(2.6) in the absence of vaccination, using COVID-19 mortality data for the U.S. for the period from October 12, 2020 to January 20, 2021.
| Parameter | Value | Confidence interval |
|---|---|---|
| β1 | 0.224334/day | [0.201828, 0.370926]/day |
| β2 | 0.072957/day | [0.000002, 0.178140]/day |
| εo | 0.507666 (dimensionless) | [0.282518, 0.692441] (dimensionless) |
| εi | 0.623667 (dimensionless) | [0.020807, 0.999999] (dimensionless) |
| α12 | 0.006229/day | [0.004732, 0.008508]/day |
| α21 | 0.000798/day | [0.000000, 0.000999]/day |
| δi | 0.000573/day | [0.000000, 0.002399]/day |
| δh | 0.009505/day | [0.000708, 0.011030]/day |