Table 1.

Meaning of parameters and variables of the model (1)

Parameters/variables	Meaning
S(t)	Population of susceptibles
H(t)	Infectives with HIV that have not yet developed AIDS symptoms
A(t)	Infectives with AIDS symptoms
Λ	Recruitment rate (birth rate of Turkish people)
$\frac{1}{v}$	Duration spent in the HIV stage before developing AIDS symptoms
$\frac{1}{\mathit{\mu }}$	Life expectancy of Turkish people
$\frac{1}{\mathit{\phi }}$	Average duration spent in the AIDS stage
α	Incidence rate