Hepatitis B is a contagious disease and can be transmitted. There are three main ways to transmit hepatitis B: 1. blood transmission, including blood transfusions, application of blood products, but also accidental blood exposure, such as medical personnel in the treatment of hepatitis B patients accidentally puncture the skin, or drug users share syringe needles, or in informal institutions tattoo, eyebrow tattoo, tooth extraction when the skin is broken. 2. vertical transmission from mother to child. 3. sexual transmission. Life contact, such as shaking hands, hugging, eating together, etc. generally does not infect hepatitis B. However, some people have broken mucous membranes of the digestive tract, such as having mouth ulcers, stomach ulcers, etc., which can occasionally cause small amounts of transmission.