<unk>  was first produced in 1990 by the World Health Organization and updated in September 2005. It is an approach for use in resource limited settings and is widely used in Africa and Asia and has been a useful research tool in studies of progression to symptomatic HIV<unk> . Following infection with HIV, the rate of clinical<unk>  progression varies enormously between individuals. Many factors such as host susceptibility and immune function, health care and co-infections, as well as factors relating to the viral strain may affect the rate of clinical<unk>  progression.
WHO Disease Staging System for HIV Infection and Disease in Adults and Adolescents
WHO Disease Staging System for HIV Infection and Disease in Children
WHO disease staging system for HIV infection and disease
CDC classification system for HIV infection
Current HIV Research
Rapid Reviews: COVID-19
AIDS Vaccine Bike Trek
HIV disease progression rates