In the United States, high-risk HPV types cause approximately 3 percent of all cancer cases among women and 2 percent of all cancer cases among men (12).
More than 40 HPV types can be easily spread through direct sexual contact, from the skin and mucous membranes of infected people to the skin and mucous membranes of their partners.
They can be spread by vaginal, anal, and oral sex (1).
Other HPV types are responsible for non-genital warts, which are not sexually transmitted.
Most high-risk HPV infections occur without any symptoms, go away within 1 to 2 years, and do not cause cancer.
Some HPV infections, however, can persist for many years.
Persistent infections with high-risk HPV types can lead to cell changes that, if untreated, may progress to cancer.High-risk HPV types cause approximately 5 percent of all cancers worldwide (11).Sexually transmitted HPV types fall into two categories: HPV infections are the most common sexually transmitted infections in the United States.About 14 million new genital HPV infections occur each year (4).In fact, the Centers for Disease Control (CDC) estimates that more than 90 percent and 80 percent, respectively, of sexually active men and women will be infected with at least one type of HPV at some point in their lives (5).Around one-half of these infections are with a high-risk HPV type (6).