Yearly, an estimated 448 million treatable sexually transmitted infections (STIs)1 occur worldwide.
Over 80% of all new HIV infections are acquired through sexual transmission.2 The enormous
burden of morbidity and mortality due to STIs impact directly on quality of life, sexual and
reproductive health (SRH) and child health, and indirectly as cofactors for HIV transmission. Sexually
transmitted diseases such as syphilis, chancroid ulcers and genital herpes simplex virus ulcers
greatly increase the risk of acquiring or transmitting HIV and in some cases account for 40% or
more of HIV transmissions.3 In addition, STIs are the third most common cause of healthy life years
lost by women of reproductive age, exceeded only by maternal causes and HIV.
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