Over the past few decades, more than 30 sexually transmitted pathogens have been discovered, including the Human Immunodeficiency Virus (HIV). The World Health Organization estimates that each year there are an estimated 374 million new infections of curable STIs such as chlamydia, gonorrhea, syphilis, and trichomoniasis. These infections may lead to unnecessary deaths despite the availability of cost-effective prevention methods for most of these conditions.
