| HCV | hepatitis C virus; hog cholera virus |
|---|---|
| HDV | hepatitis D virus; hepatitis delta virus |
| HLV | hamster leukemia virus; herpes-like virus; hypoplastic left ventricle |
| HTLV | human T-cell leukemia/lymphoma virus; human T-lymphotropic virus |
| LAV | leafhopper A virus; lymphadenopathy-associated virus |