HPV stands for human papillomavirus. Human Papillomavirus are viruses that cause warts. There are over 100 strains of HPV, and a subset of those strains, about 4 to 6 of them, will cause genital warts. When people talk about HPV, particularly in terms of sexually transmitted infections or diseases, they're really referring to genital warts. Those warts can appear of different areas of the genitals. They can appear inside the vaginal walls. They can appear on the outside of the vagina, which is the vulva. They can appear on the shaft of the penis. They can appear on the anus. They can also appear, in some cases, on the cervix. There are certain strains of HPV that appear on the cervix. Those are often not visible to the naked eye. And in order to detect those, a woman would have to have a PAP test. So, again, human papilloma virus, over 100 strains of it. Several of those strains will cause warts on the genital, and those are called genital warts. They are human papilloma virus, or HPV.