parameters

name

value

name

value

$b_1$

100

$b_2$

5000

${\sigma }_1$

0.4

$d_2$

0.4

${\beta }_1$

$4\times {10}^{-4}$

${\beta }_2$

vary

$d_1$

0.08

${\alpha }_2$

vary

${\alpha }_1$

0.3

initial values

name

value

name

value

$S_1\left(0\right)$

1000

$S_2\left(0\right)$

10000

$I_1\left(0\right)$

20

$I_2\left(0\right)$

200