What is chronic hepatitis B?

Chronic hepatitis B (hep B) is caused by long-term infection with the hepatitis B virus (HBV). Over time, chronic hepatitis B can lead to serious liver damage.

Hepatitis B is spread through contact with infected bodily fluids. It can often occur at birth. Babies infected with hepatitis B have about a 90% chance of developing lifelong infection.

Hepatitis B is not spread through food, water, or air. It is not spread through touching, kissing, sharing cups and utensils, or drinking alcohol.

What does the liver do?

The liver is a vital organ. It’s one of the largest organs inside the body, and you can’t live without it. Your liver does a lot of things that help you every day, including: