Inclusion Criteria:  Study population will include a total of 200 (100 who are <5 years and 100 who are 6-to-14 years, including equal number of female and male study participants) HIV-infected Ugandan children and adolescents admitted with non-malarial febrile illnesses (NMFIs) to Baylor College of Medicine Children's Foundation - Uganda.  Exclusion Criteria:  Critically ill patients will not be recruited.