This patient has herpes zoster, otherwise known as shingles, which is a reactivation of infection -with the varicella-zoster virus (VZV).This virus belongs to the herpes virus family. Viruses in this family are responsible for a variety of human infections, including herpes labialis (caused by herpes simplex virus type 1), genital herpes (caused by herpes simplex virus type 2), infectious mononucleosis (caused by Epstein-Barr virus), Kaposi sarcoma (caused by herpes virus 8), and roseola infantum (caused by herpes viruses 6 and 7).
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