| Virus | Family | Virus | Tumors associated |
| RNA | Retroviridae | HTLV1 HIV | Adult T leukemia, lymphoma |
| Flaviviridae | HVC | Hepatocellular carcinoma | |
| DNA | Papillomaviridae | HPV-HR | Papilloma, anogenital carcinomas, cancers of the skin and upper respiratory tract |
| Hepadnaviridae | HBV | Hepatocellular carcinoma | |
| Herpesviridae | EBV | Burkitt’s lymphoma, nasopharyngeal carcinoma, leiomyoma and leiomyosarcoma, lymphoma immunoblastic, Hodgkin’s disease? | |
| HHV8 (KSHV) | Kaposi’s sarcoma, B-cell lymphoma |