Positive predictive value is poor in low risk populations seen in universal screening for HIV infection

Suggested screening thresholds range from one case per 500 population (0.2%) to screening all adults. 2 3 The Health Protection Agency estimated that the overall prevalence of HIV infection in the UK was 0.15%. In antenatal screening, delaying release of the result until confirmatory testing can circumvent this problem, but in other areas those tested may expect faster results.