HIV-2 Data Details

The HIV incidence surveillance component of the National HIV Surveillance System (NHSS) is population-based and conducted in 18 states and 3 cities (including the District of Columbia). National incidence estimates for the 50 states and DC are produced by determining the ratio of HIV incidence to HIV diagnosis in the incidence areas and extrapolating to an incidence estimate for non-incidence areas. This produces a national estimate of HIV incidence among persons 13 years of age and over. Data are based on the CDC adult HIV/AIDS confidential case report, Form 50.42A, Rev. 3/2007, and extended back-calculation methods. Confidence intervals reflect random variability affecting model uncertainty but may not reflect model-assumption uncertainty; thus, they should be interpreted with caution.