Understanding hepatitis b causes and prevention is important for protecting liver health and reducing the risk of infection. Hepatitis B is a viral infection that primarily affects the liver and can spread through infected blood and certain body fluids. Common causes include transmission from an infected mother to her baby during childbirth, unprotected sexual contact, sharing contaminated needles, and unsafe medical or tattoo procedures. Prevention includes getting the recommended hepatitis B vaccination, practicing safe sex, avoiding shared needles or personal items such as razors, and ensuring sterile equipment for medical and cosmetic procedures.