दालाय साहारान आफ्रिका , इउरप आरो सा - आमेरिकानिफ्राय एपिदेमिअलजिकेल बिजिरसंफोरा बिथोन होयोदि मोनसे आथोनारि गारायनि नुजाथिनायाव HIVजों सनदेरजानायनि खैफोदा ब्रैगुनफ्राम बारासिन दं ।
Epidemiological studies from sub Saharan Africa Europe and North America have suggested that there is approximately a four times greater risk of becoming infected with HIV in the presence of a genital ulcer .