1. exp epitopes/2. epitope*.mp3. 1 or 24. exp HLA Antigens/5. exp Antigens, CD8/6. 4 or 57. exp Hepatitis B/8. (Hepatitis B or HBV).mp.9. 7 or 810. 3 and 6 and 9. Here, CD8A is linked to hepatitis A virus infection.