no data <35 35–70 70–105 105–140 140–175 175–210 210–245 245–280 280–315 315–350 350–500 >500 In 2012, about 0.5% of adults were infected with syphilis, with 6 million new cases. In 1999 it is believed to have infected 12 million additional people, with greater than 90% of cases in the developing world. It affects between ...
