Chronic Hepatitis B Virus (HBV) is a virus that infects the liver and can cause long-term damage. It is spread through contact with infected blood or body fluids, such as through unprotected sex, sharing needles, or from mother to child during childbirth. Chronic HBV can lead to serious health problems, including cirrhosis and liver cancer. Treatment is available to help manage the virus and reduce the risk of complications.