Positive item 245 of Hepatitis B Pentathlon should refer to the positive item 245 of Hepatitis B Pentathlon, which mostly indicates the recovery period after acute hepatitis B infection, and generally there is no need to take hepatitis B vaccine for the time being. The 245th item of hepatitis B five items is hepatitis B surface antibody, hepatitis B e antibody and core antibody, these three positive items mostly indicate that it belongs to the recovery period of acute infection of hepatitis B vaccine, the body has already produced surface antibody, which has certain immunity against hepatitis B virus, and the titer of antibody is generally higher at this time, even if injecting the hepatitis B vaccine at this time, it will not make the antibody higher, which is not very meaningful. For those who are found to be positive for items 2, 4 and 5 of the five items of hepatitis B, it is recommended that they should consult a doctor in time and be diagnosed by a professional doctor.