Papovaviruses

This group of viruses has the ability to transform cells and is related to tumor growth. We divide this family into two genera:
 * Papillomavirus – the cause of warts and tumor growth
 * Polyomavirus

Virion
The size of the virion is between 40–60 nm

Human papilloma virus (HPV)

 * Together with other factors of the external environment, it is related to the development of cancer of the cervix uteri.
 * According to oncogenic potential, the virus is divided into two types:
 * high risk HPV (16, 18, 45, 46),
 * low risk HPV (6, 11, 42–44).


 * Transmission – through sexual contact (it does not manifest itself clinically in men).

Wart Virus

 * It occurs more often in immunosuppressed people
 * There is a possibility of treatment with ointments with inducers of interferons

BK polyomavirus

 * Significantly expanded, isolated from the urine of patients after kidney transplantation and with multifocal leukoencephalopathy.

JC polyomavirus

 * Repeatedly isolated from the brain of patients who died of progressive multifocal leukoencephalopathy.