 Others argue that prevalence rates are much higher, and that many cases of child abuse are never reported.One study found that professionals failed to report approximately 40% of the child sexual abuse cases they encountered.A study by Lawson & Chaffin indicated that many children who were sexually abused were "identified solely by a physical complaint that was later diagnosed as a venereal disease... Only 43% of the children who were diagnosed with venereal disease made a verbal disclosure of sexual abuse during the initial interview."