“…Thus, it is reasonable to presume that warts share the same tumor associated antigens if the various types of warts are caused by a single type of HPV. However, numerous types of HPVs have recently been identified by DNA mapping using restriction endonucleases, molecular hybridization, and immunologic studies (14,15,19,20). Specific types of virus are specifically associated with distinct types of lesions, e.g.…”