Syphilis-specific antibodies cannot be completely excluded at 6 weeks. If the syphilis-specific antibody test is still negative at 6 weeks after high-risk behavior, it is still not possible to completely rule out syphilis infection because the incubation period for syphilis may be longer. Some may reach three months. So this situation still need to be tested again at three months, if the test is still negative at three months, can be basically ruled out. So a 6-week negative syphilis test should not be taken lightly, and regular testing for the relevant antibodies is needed. Syphilis is mainly transmitted through blood and sexual contact, so you should avoid these high-risk behaviors.