| HAV | Hepatitis A virus |
| HBV | Hepatitis B virus |
| HCV | Hepatitis C virus |
| HDV | Hepatitis D virus (Delta agent) |
| HEV | Hepatitis E virus |
| HGV | Hepatitis G virus |
| HKRCBTS | Hong Kong Red Cross Blood Transfusion Service |
| IVDU | Intravenous drug user |
| PMPS | Premarital Package Service |