HPV: 70 genetically distinct types
type 1, 2,4, 7 - benign squamous papillomas(warts)
HPV : squamous cell carcinoma (cervix, anogenital region),oral&laryngeal ca
type 16, 18 85% invasive SCC, and precursors:
less commonly type 31, 33, 35, 51 carcinoma in situ, displasias. low malignant potential type 6, 11