What Is the Herpes Zoster Virus?
Overview The virus that causes herpes zoster, more commonly known as shingles, is the varicella-zoster virus (VZV); this is also the virus that causes chickenpox. Shingles is a secondary infection of VZV. Chickenpox The VZV is never fully cleared from the system after chickenpox. Rather, the virus becomes dormant in some cells in the body.