Table 1. Infections associated with cancer development.

Tumor type	Infectious agent
Cervical cancer	Human papilloma virus
Head and neck cancer	Human papilloma virus
Hepatocellular carcinoma	Hepatitis B virus, Hepatitis C virus
Burkitt's lymphoma	Epstein-Barr virus
Post-transplant lymphoproliferative disease	Epstein-Barr virus
Nasopharyngeal carcinoma	Epstein-Barr virus
Gastric cancer	Helicobacter pylori
Primary effusion lymphoma	Human herpes virus 8
T-cell leukemia	Human T-cell leukemia virus 1 and 2
Kaposi's sarcoma	Kaposi's sarcoma-associated herpes virus