Hepatitis is divided into acute hepatitis and chronic hepatitis according to the duration of the disease. Acute hepatitis (usually acute hepatitis B or acute hepatitis C) that is prolonged and lasts for more than six months turns into chronic hepatitis. Due to the strong compensatory capacity of the liver, hepatitis usually starts insidiously and becomes chronic by the time it is detected. For chronic hepatitis, one of the main concerns is whether chronic hepatitis is contagious. Is chronic hepatitis contagious? Chronic hepatitis is mostly caused by the hepatitis virus, which is contagious when it persists in the body. Therefore, chronic hepatitis is contagious. How is chronic hepatitis contagious? Chronic hepatitis is transmitted in a similar way to hepatitis B. It is mainly transmitted through blood, vertical transmission (including mother-to-child and father-to-child transmission), medical transmission, sexual contact transmission, and close contact transmission. However, general hugging, eating, working together, etc. are not contagious. Among chronic hepatitis, especially chronic hepatitis B is the most widely spread and causes the greatest impact. There are about 130 million hepatitis B virus carriers in China, about one-third of patients have liver damage, hovering between virus carriers and chronic hepatitis patients, and 30 million are chronic hepatitis patients, who are infectious and are potential sources of hepatitis transmission. Therefore, healthy people should be actively vaccinated to prevent being infected by virus carriers and chronic hepatitis. Patients infected with chronic hepatitis should be actively treated to reduce the chance of transmission to family members and to prevent the condition from worsening and threatening the life of the patient.