Human Tumor virus Virus particle, nucleic acid or antigen is present in tumor cells, and virus antibody is present in patients serum The incidence of tumor is higher in the infected group than uninfected qroup Virus infection occurred before tumorigenesis .The virus in vitro cell transformation capabilities, allows the cells to become cancerous accination can significantly reduce the incidence of tumors in vivoHuman Tumor Virus •Virus particle, nucleic acid or antigen is present in tumor cells, and virus antibody is present in patient’s serum. •The incidence of tumor is higher in the infected group than uninfected group. •Virus infection occurred before tumorigenesis. •The virus in vitro cell transformation capabilities, allows the cells to become cancerous. •Vaccination can significantly reduce the incidence of tumors in vivo