Many definitions have been developed for epidemiological surveillance of HIV/AIDS such as the Bangui definition and the 1994 Expanded World Health Organization AIDS Case Definition. However, these systems are neither sensitive nor specific for clinical staging. In developing countries, the World Health Organization staging system for HIV infection and disease that uses clinical and laboratory data is widely employed. The Centers for Disease Control (CDC)<unk>  System for HIV/AIDS is another primary system used that is primarily based on CD4 T-lymphocyte counts.
HIV AIDS classification
HIV AIDS epidemiology and demographics
HIV AIDS laboratory findings
Syphilis classification
HIV AIDS physical examination
HIV AIDS screening
AIDS epidemiology & demographics
Mumps diagnostic criteria