HIV/AIDS-Pneumonia Coinfection Model with Treatment at Each Infection Stage: Mathematical Analysis and Numerical Simulation

Table 2

Description of parameters in model (3).

Parameter	Biological meaning	Unit
	Natural death rate
	Recruitment rate of susceptible individuals
	The progression rate from acute HIV infection to chronic HIV
	The progression rate from chronic HIV infection to AIDS
	The modification parameter accounting that acute HIV-infected individual is more susceptible to pneumonia
	The modification parameter accounting that chronic HIV-infected individual is more susceptible to pneumonia
	The modification parameter accounting that AIDS patient individual is more susceptible to pneumonia infection
	HIV/AIDS force of infection
	Pneumonia force of infection
	The progression rate from acute HIV and pneumonia coinfection to chronic HIV and pneumonia coinfection
	The progression rate from coinfection of chronic HIV-pneumonia to AIDS-pneumonia coinfection
	Pneumonia disease-induced death rate
	AIDS disease-induced death rate
	AIDS and pneumonia diseases-induced death rate
	Treatment rate for pneumonia-infected individuals
	Portion of pneumonia infected who become susceptible again	Dimensionless
	Treatment rate for acute HIV-infected individuals
	Treatment rate for chronic HIV-infected individuals
	Treatment rate for AIDS stage-infected individuals
	Treatment rate for acute HIV and pneumonia coinfected
	Treatment rate for chronic HIV and pneumonia coinfection
	Treatment rate for AIDS and pneumonia coinfection
	HIV/AIDS transmission rate
	Pneumonia transmission rate