In the case of warts on the skin, the HPV is transmitted by direct contact with another person. There is often a minor cut or abrasion in the skin of the receiving person that facilitates transfer. This type of transmission is very common, and over 50 percent of children will develop warts at some time in their lives.
In the case of anogenital HPV, the virus is spread by direct sexual contact. Again, the virus is very common, and over 40 percent of sexually active teenage women have evidence of this infection. There is no data on the infection rate in men, but it is presumed to be as high as women because the virus is transmitted sexually.