Even after a syphilis patient is cured, if a serological test is done, the confirmatory test for syphilis still shows a positive antibody for syphilis. This is like having antibodies from the hepatitis B vaccine, which may follow the patient for many years or for life. Even after the syphilis is cured, the antibodies may still be positive, but the titer of the serological test, that is, the infectiousness, is no longer there, only that there are still antibodies, indicating that the syphilis was once infected, and it may take many years to turn negative or to carry it for life and no longer turn negative.