some viruses can lead to cancer
Hepatitis B Virus (HBV) and Hepatitis C Virus (HCV)
Kaposi Sarcoma-Associated Herpesvirus (KSHV)
Merkel Cell Polyomavirus (MCV)
Human Papillomavirus (HPV)
Human Immunodeficiency Virus Type 1 (HIV-1, or HIV)
Human T-Cell Lymphotropic Virus Type 1 (HTLV-1)
Epstein-Barr Virus (EBV)
