==Epidemiology==[[Image:Syphilis world map - DALY - WHO2004.svg_thumb_Age-standardized death from syphilis per 100,000 inhabitants in 2004Syphilis is believed to have infected 12 million additional people in 1999, with greater than 90% of cases in the developing world.
=== Jarisch-Herxheimerjeva reakcija ===Eden od možnih stranskih učinkov zdravljenja je Jarisch-Herxheimerjeva reakcija.