I tested positive for chronic HBV infection about 5 months ago. I know there is a vaccine to prevent transmission, however, I would like to know how long my partner should wait after taking this vaccine, before having sex with me without any risk of transmission?

You should use condoms until a postvaccination blood test (hepatitis B surface antibody, or anti-HBs) shows that your partner is protected from HBV infection. The efficacy of latex condoms in preventing infection with HBV is unknown, but their proper use might reduce the risk of transmission. Your sexual partner should have the 2- or 3-dose series of HepB vaccine (depending on brand) and postvaccination blood testing 1 to 2 months after the last dose of vaccine. If your partner’s test shows adequate anti-HBs (at least 10 mIU/mL), then they should be protected against HBV infection.