Which virus is known to infect the liver and is highly contagious?

Hepatitis B is a virus that specifically targets and infects the liver, leading to inflammation and potentially severe liver damage. It is classified as a bloodborne pathogen and is known for its ability to spread easily through contact with infectious body fluids, such as blood, semen, and vaginal secretions. Its high contagion rate means that it can be transmitted through various means, including sexual contact, sharing needles, or from mother to child during childbirth.

This virus can result in chronic conditions, including cirrhosis and liver cancer, making it a serious public health concern. Unlike the other viruses listed, which affect different parts of the body, Hepatitis B's primary focus on liver health underlines its specificity and severity in terms of contagiousness and health impact.