Hepatitis B 2-4-5 positives can usually donate blood. Hepatitis B 2.5 is an important indicator for checking whether you have hepatitis B. The first item is usually hepatitis B surface antigen, and a positive hepatitis B surface antigen indicates that you have hepatitis B, while a negative one does not. In the initial screening for blood donation, only the hepatitis B surface antigen is usually tested, so the hepatitis B surface antigen of patients who are two-four-five-positive is also negative, so these patients can also donate blood. Hepatitis B 2.45 positive patients may be in the acute hepatitis B recovery period, there may be a small amount of virus in the body, after donating blood, the blood donation center will also carry out a second test, if hepatitis B virus is detected in the blood, then this blood will not be used. It is recommended that you ask the blood donation staff if you can donate blood if you have a positive Hepatitis B 2.5 or 2.4.5, and their opinion will prevail.