How many cancer causing strands of hpv are there that can affect getting cancer of the genitals and neck and throat?

Mostly 2, 6 we think: Over 120 different types of hpv. Different types infect different parts of body. Most are harmless, easily treatable and not precancerous. Some produce warts that are easily seen and others growths that are nearly invisible. Types 16 and 18 account for vast majority of cervical cancers. Type 16 has been linked to oral cancer. Contact spreads the virus.Sexual contact spreads types 16, 18 and others.