Africa Check: Are 60% of South Africa’s sex workers HIV positive?

Are nearly two-thirds of South Africa's estimated 150,000 sex workers HIV-positive? At least four studies published since the mid-1990s suggest an HIV-prevalence of between 45% and 69% in the sex workers that were surveyed, but dig a little deeper and it turns out the research conducted to date has been limited in scope. By Sintha Chiumia for AFRICA CHECK.