Generally, if infected with syphilis, antibodies to syphilis can be detected about 3-4 weeks after high-risk behavior, and some patients may not have a positive syphilis result until about 5-6 weeks. Syphilis is a sexually transmitted disease caused by infection with the syphilis spirochete. After the syphilis spirochete has invaded the body, it is transmitted through the bloodstream. After the syphilis spirochete enters the blood circulation, the relevant antibodies may be detected in about 3-4 weeks due to the immune response of the body. In contrast, if syphilis is contracted 5-6 weeks after high-risk sex, a positive result can be obtained with a rapid syphilis reaction test. In other words, syphilis-related antibodies cannot be 100% detected 3-5 weeks after high-risk behavior. If they are not detected at this time, it is best to test again around 5-6 weeks, when most infected patients can be tested. It is recommended that patients with symptoms of syphilis such as hard chancre should go to a regular hospital dermatological venereal disease department in a timely manner and get a clear diagnosis after multiple reviews. The actual fact is that you can find a lot of people who have been in the business for a long time, and they’ve been in the business for a long time.