Different types of viral hepatitis are transmitted through different routes, and preventive measures should start from the cause of the disease, cutting off transmission routes and protecting susceptible individuals. Hepatitis A and E are mainly transmitted through the fecal-oral route, usually by consuming food or water contaminated with the hepatitis A or E virus. Hepatitis B and C, on the other hand, are mainly transmitted through blood, sexual contact, and from mother to child; general contact usually does not lead to infection. Preventive measures include cutting off transmission routes, such as avoiding contact with patients with viral hepatitis, and getting vaccinated against hepatitis B and A.