Regardless of the population diagnosed with hepatitis B, the hepatitis B surface antigen needs to be checked. If the hepatitis B surface antigen is positive (+), it indicates infection with the hepatitis B virus; if the hepatitis B surface antigen is negative (-), it means that there is no infection with the hepatitis B virus. For newborns, there are no susceptibility factors, for example, the mother of the newborn is herself a hepatitis B patient, and the risk of this infection is much higher compared to other newborns. For hepatitis B mothers, are there any interception measures to protect the newborn during delivery and after birth? Therefore, if you want to diagnose hepatitis B infection, you need to check the hepatitis B surface antigen to confirm the diagnosis.