What part of the body does Hepatitis B Virus (HBV) primarily affect?

Hepatitis B Virus (HBV) primarily affects the liver, which is crucial for various metabolic processes, detoxification, and the production of important proteins. When a person is infected with HBV, the virus can lead to inflammation of the liver, a condition known as hepatitis, which can result in a range of symptoms from mild illness to severe liver complications, including liver cirrhosis and liver cancer.

Focusing on how HBV interacts with the liver helps in understanding the significance of vaccination and treatment options aimed at preventing liver damage. Though the other organs listed, such as the lungs, heart, and kidneys, play vital roles in the body, they are not directly impacted by HBV. Hence, understanding the liver's role in relation to HBV is essential for both prevention and treatment of the virus.