Hepatitis B air is not contagious. Hepatitis B is an infectious disease, which generally belongs to the gastrointestinal tract, including three ways of transmission: 1, mother-to-child transmission, that is, the mother of the child directly through the placenta, or the birth of the child; 2, sexual transmission, is the transmission between husband and wife or sexual partners; 3, blood transmission, including tooth extraction, haircut, eyebrow tattoo, tattoo, including the use of blood, etc., these unsafe will be These unsafe conditions can cause blood transmission. The air will not transmit the hepatitis B virus, and the hepatitis B virus will not be transmitted to other people through the air, so do not be afraid of hepatitis B patients, normal life is safe.