Notes:
 a Rate represents co-infection with HIV-1 and HIV-2 and should not therefore be combined with other figures.
 b Data are best available but are not necessarily reliable due to small (<100) or unknown sample size.
 c Data combined.
 d Rate represents infection with HIV1 and/or HIV2. 
 + Data changed and/or added.
 
Risk area codes:
 UL -- Urban low risk
 UH -- Urban high risk
 OL -- Outside city low risk
 OH -- Outside city high risk
 2 -- Data for HIV2
 
Test Type Codes:
 ELISA - - Enzyme-linked immunosorbent assay or EIA
 ELISA *2 or 3 - - Repeated testing by ELISA (2 or 3 times)
 IFA - - Indirect immunofluorescent assay or IF
 LIA - - Line immunoassay
 PCR - - Polymerase Chain reaction 
 RAPID - - Rapid and simple assay
 RAPID*2 or 3 - - More than one Rapid assay
 RIA - - Radioimmuno assay
 RIPA - - Radioimmunoprecipitation assay
 UNK - - Unknown
 WB - - Western blot assay or IB
 
Source: U.S. Bureau of the Census, HIV/AIDS Surveillance Data Base. 9/2004 Update.