There are over a 150 different types of human papilloma virus, the virus that causes verruca vulgaris, more commonly referred to as warts.  Warts are very common…in Australia 22% and in the Netherlands 33% of children were found to have cutaneous warts. Human papillomavirus type 1, 2, 4, 27, 57, and 63 cause common warts. … Read more »