Good evening Dr, I have donated blood in 2017 with blood source and the tests came out Reactive to Hepatitis B Core Antibody. I contacted a doctor and did a test and it came out negative. I did not have the disease. However, after a year now, I have donated blood again, and I am ineligible. I am surprised that it became reactive twice. Are there other reasons or symptoms that might be causing this? Should I do anything about this? Thank you, Best Regards,