Papillomaviruses are a very diverse group of viruses that infect human skin and mucosal cells, which serve as a...

Papillomaviruses are a very diverse group of viruses that infect human skin and mucosal cells, which serve as a barrier between the environment and a human being. Most representatives of this group do not cause any symptoms, but some strains can cause skin warts, and highly pathogenic types may cause cancer

Know more: http://www.cdc.gov/hpv/