How can hpv cause cervical cancer?

HPV/cervical cancer: Human papilloma virus (hpv) infects the cells of the cervical lining. Depending on the subtype of hpv, this infection can interfere with cellular growth signals in a way that causes cells to grow abnormally (cervical dysplasia). In rare cases, the cells develop the ability to invade the tissue under the cervical lining (cervical cancer).

By infecting cervix: The human papilloma virus (hpv) inserts its dna into the human host's cervical cell's dna. It uses the growth factors from the human to reproduce itself. If this gets out of control it becomes cancer. It is more complicated, but that's it in a nutshell. Of course we are still seeking more knowledge and understanding to end cancer as we know it. We are making good progress with cervical cancer.