HPV is not a single virus but a group of over 200 related viruses, some of which are considered low-risk and cause mild conditions like warts, while others are high-risk and associated with cancers such as cervical, anal, and throat cancer. The high-risk strains, particularly HPV-16 and HPV-18, are responsible for the majority of HPV-related cancers. Because HPV infections often do not present symptoms, many individuals carry the virus unknowingly, increasing the likelihood of transmission. However, in most cases, the body's immune system clears the virus naturally within a couple of years, while persistent infections pose a higher risk of developing serious complications.