Hepatitis B is mainly transmitted through blood, semen and vaginal secretions when the infected person has a wound on his skin or mucosa. Of course, sex is contagious. In addition, mother-to-child or father-to-child transmission is possible. The best prevention method is to inject hepatitis B vaccine. It is best to wear a condom before producing antibodies. Kissing is generally not contagious. However, if both parties have oral ulcers, kissing or eating, * * * using toiletries may be contagious. Therefore, family members should not use toothpaste and toothbrush. Daily life is generally not contagious.