In 2016, Americans were infected with more than 2 million new cases of gonorrhea, syphilis and chlamydia, the highest number of these sexually transmitted diseases ever reported, the Centers for Disease Control and Prevention said Tuesday.
It's called the "Great Pretender," because the symptoms of syphilis which include rashes and chancres, or sores, fever, swollen lymph glands, sore throat, headaches, muscles aches and fatigue, mimic other diseases.
As the disease progresses, the symptoms go away, and progress silently to it's most deadly stage.
"Back in the '40s, the advent of penicillin, which is quite effective against syphilis, allowed us to dramatically reduce cases," she added.
There were 628 cases of congenital syphilis among newborns reported in 2016, with more than 40 deaths and severe health complications among the babies who survived.