Human papillomavirus is hypothesized to be responsible for some types of cervical cancer. A woman who becomes infected with this virus can recover from the initial viral infection but may retain viral DNA in the nuclei of some of her cells. Many years later, she may develop cervical cancer as the result of this latent infection. Explain how a latent infection can lead to a change that shifts normal cells into cancerous cells that have lost their ability to control their own cell division.