Human papillomaviruses (HPVs) are composed of a big group of over hundred related viruses. Some of them can cause warts, and some can in worst case lead to cancer. High-risk HPVs can cause several types of cancer such as: cervical cancer, anal cancer, oropharyngeal cancers (cancers of the middle part of throat, including the soft palate, the base of the tongue, and the tonsils), vaginal cancer, ...