In Pretoria, a total of 1152 prostitutes compete for business at 30 different sites. This is according to a study on the state of homelessness conducted by the University of Pretoria and Unisa. The report, "Path Out of Homelessness", warns of a multiplicity of social situations in the inner city where diseases proliferate. The report says that on average, 10 prostitutes ply their trade at a single site, but this can in places rise to as many as 200. Of 416 sex workers screened for HIV and TB since October last year, 187 were HIV-positive and of these 177 also had significant TB symptoms.