Research from specialist HIV prevention and treatment clinics for female sex workers in Nairobi has found that the number testing positive for HIV dropped by more than two-thirds between 2008 and 2017.
The overall percentage of female sex workers who were positive for HIV decreased from 44% in 2008 to 12% in 2017 (p value < 0.0001), amounting to a 67% reduction in prevalence after adjustment for known demographic and behavioural factors that could influence the results. In all age groups there was a general trend downwards in most years. Prevalence in the under 25 year olds was used to estimate the number of new infections because previous national surveys suggest that this age group are responsible for the majority of new infections. In the under 25s, positive diagnosis at enrolment increased from 14% to peak at 19% in 2010 but then fell down to 5% by 2017, which could correlate to a decrease in the overall number of new HIV cases.