Virus cause serious diseases like human measles, measles, polio, rabies, influenza, jaundice, herpes, dengue, hepatitis, Ebola, AIDS, Sars, swine flu, cancer etc. Virus that cause cancer in the human body are called oncogenic virus. Cancer-causing DNA viruses are called simian and RNA virus are called retrovirus. Human papillary virus (HPV) causes tumors, Kaposi sarcoma herpes virus (KSHV) causes skin cancer and hepatitis-C virus causes liver cirrhosis.