Hepatitis B is a viral infection that attacks the liver, causing inflammation and potentially leading to serious health issues. It is caused by the Hepatitis B virus (HBV) and can be transmitted through contact with infected bodily fluids, such as blood, semen, or vaginal secretions. Many people with Hepatitis B may not show symptoms, but some can experience fatigue, jaundice, and abdominal pain. Vaccination is available and effective in preventing the infection, making it an important public health measure. Regular screening and monitoring are recommended for those at risk to manage the disease effectively.