Variables

Description

X

Susceptible class

Y

Latently infected (exposed) class

Z

Infected class

$\Lambda$

Recruitment rate into the population

$\mu$

Natural death rate

d

Death rate due to infection

$\beta$

Probability rate of transmission

$r_1$

Treatment rate for exposed class

$r_2$

Treatment rate for infected class

k

Infection rate for exposed individuals

$k_1$

Progression rate of exposed class

$k_2$

Progression rate of infected class

$\eta$

Rate of infectiousness of infected class, where $\eta >1$