Symbol

Meanings

Value at Different Stages

Source

3.3 - 3.9

3.10 - 3.14

3.15 - 3.25

3.26 - 3.30

3.31 - 4.7

4.8 - 5.11

N

Total population of Jilin

3623713

[20]

θ

Vaccine coverage rate

87%

[21]

δ

Immune escape rate of Omicron

0.35

[23]

C

Number of contacts

14

7

6

5

4

4

[24]

q

Track rate

0.25

0.25

0.25

0.55

0.65

0.7

[25]

1 λ (days)

Time of isolation

14

[26]

1 σ 1 (days)

Time for group to stay at E1

1

[17]

1 σ 2 (days)

Time for group to stay at E2

2

[17]

ε

Proportion with symptoms

0.525

[27]

α I

Detection rate with symptoms

0.2306

Estimate

0.4

0.55

0.65

0.7

0.75

[28]

α A

Detection rate without symptoms

3.5513e−14

Estimate

0.4

0.5

0.65

0.7

0.75

[28]

α Q E

Tracking isolation detection rate

0.55

[28]

γ

Recovery rate

0.1

[29]

β

Contact infection rate of symptomatic infected persons

0.4265

Estimate

η

Attenuation factor

0.1440

Estimate