An image of a koilocyte shows human ectocervical cells expressing HPV-16 E5 oncoprotein, and immortalized with HPV-16 E6 and E7 oncoproteins. Formation of koilocytes requires cooperation between HPV E5 and E6 oncoproteins. The cell culture is stained with hematoxylin and eosin. Image courtesy of the National Cancer Institute.

The Frederick National Lab and Moffitt Cancer Center have established a collaboration to research antibody responses against the human papillomavirus (HPV) in males following administration of the Gardasil vaccine. The vaccine prevents HPV infections that can cause a number of cancers, including oral cancers.