Hello doctor, Last year june I came to know that I am suffering from Syphilis. On my first test my VDRL came up positive with 1: 32 dilution and TPHA positive. After I get 12 shots of penicillin 2.4 LA injection on September 2017 my reports shows VDRL positive with 1: 8 dilution. As per doctor it was positive response to my treatment. So as per doctor's advice I keep continue my penicillin injection. Till today's date I got total 50 shots of penicillin 2.4 LA injection every Sunday. But unfortunately my VDRL is still reactive with 1: 8 dilution from last six months. My doctor said that I don't have to worry about it. He said I am already cured but my blood sample are gone to SEROFAST stage so it's still showing positive and stying constant at 1: 8 dilution. But I want to know if I am cured then why after taking 50 shots of penicillin 2.4 LA still my blood test showing reactive with 1: 8 dilution. When this SEROFAST position will go and my reports will be normal? Or this is gonna be serofast for lifetime and I have to suffer for this my whole life. Please give an estimate and detail suggestion. I am still continuing my penicillin shots. Is there any other way to get rid of this situation? Any alternative treatment procedure? Please help me. Thank you.