Warts are caused by a single virus, of which there is many strains. This virus is the human papillomavirus or hpv. This virus is one of the most prevalent infections in the world – it affects approximately 40% of all humans. Because of the warts that result from HPV, it is often times referred to as “the wart virus”. Genital warts are the most known wart in association with this virus; however, all warts are a result of HPV. Each type of wart (common, plantar, flat, and genital) comes from a different strain. Common warts originate from HPV types 2, 4 and 7. Plantar’s warts come from type 1, in the plantar area of the foot (Tips on how to get rid of plantar warts). Flat warts come from types 3 and 10 of HPV. Genital warts are a result of over 30 different types of the human papillomavirus.