Table 2 Estimated parameters for the SARS-CoV-2 viral dynamics model

From: Age- and vaccination status-dependent isolation guidelines based on simulation of SARS-CoV-2 Delta cases in Singapore

Parameters

Symbol

Unit

Median of fixed effecta (SE)

Covariate effect per year of age (SE)

Covariate effect of vaccination statusb (SE)

Standard deviation of random effectc (SE)

Maximum rate constant for viral replication

\(\gamma\)

day−1

4.25 (9.12)

-

-

3.05 (1.89)

Death rate of infected cells

\(\delta\)

day−1

0.67 (0.04)

-

0.95 (0.14)

0.48 (0.05)

Rate constant for virus infection

\(\beta\)

(copies/mL)−1 day−1

8.03 × 10−7 (8.24 × 10−7)

−0.05 (0.02)

−1.81 (1.03)

0.77 (0.57)

Viral load at symptom onset

\(V(0)\)

log10(copies/mL)

8.98 × 107 (4.64 × 107)

-

1.26 (0.96)

2.29 (0.61)

  1. aLognormal distributions were assumed.
  2. bUnvaccinated as the reference category.
  3. cNormal distributions were assumed.