The so-called "three positive" refers to the hepatitis B virus immune indicators of chronic hepatitis B patients or hepatitis B virus carriers, that is, hepatitis B surface antigen (HBsAg), hepatitis B E antigen (HBeAg) and hepatitis B core antibody (anti-HBC) are the three positive indicators, which often indicate that the virus replication in the body is active, but whether it has caused serious liver cell damage depends on the situation of liver function examination and the patient's conscious symptoms, that is, it is not "big".

Big Sanyang is contagious, and the main transmission routes include blood, mother-to-child and sexual contact.

In theory, kissing in Big Three Yang is not a common way to spread hepatitis B virus, but a complete HBV virus can be found in saliva of patients with hepatitis B.. From this point of view, it is not excluded that the other party may be infected if the oral mucosa is damaged or the other party's body's disease resistance is particularly low.

In recent years, some latest foreign research reports believe that digestive tract and saliva may also spread hepatitis B, especially in patients with big three-yang disease. When you are in close contact, you may be infected when you kiss.

Although the risk of infection is not very high, it is recommended to go to the hospital for further examination and confirmation.