What is the primary mode of transmission for viral hepatitis B?

The primary mode of transmission for viral hepatitis B is through the administration of blood products. Hepatitis B is a bloodborne virus, meaning it spreads predominantly through exposure to infected bodily fluids, particularly blood. This includes scenarios such as receiving contaminated blood transfusions, sharing needles among drug users, and transmission from mother to child at birth.

While foodborne transmission, such as contaminated dairy products or uncooked shellfish, is relevant for some other viruses, it is not associated with hepatitis B. Additionally, fecal contamination of water is linked primarily to viruses like hepatitis A, which is spread through the fecal-oral route. Hepatitis B, however, is primarily transmitted through direct contact with infectious blood and bodily fluids rather than through these other means. This understanding underscores the importance of safe medical practices and screening in preventing the spread of hepatitis B.