Herpes varicella zoster virus is a type of virus that causes chickenpox and shingles. This virus is also known as varicella zoster virus, or VZV, and is highly contagious. There are several synonyms for herpes varicella zoster virus, including varicella zoster virus, herpes zoster virus, VZV, chickenpox virus, and shingles virus. The symptoms of VZV include a rash, fever, headache, fatigue, and muscle pain. While chickenpox usually resolves on its own, shingles can be more severe and requires medical treatment. Vaccines are available to prevent both chickenpox and shingles, and early treatment of shingles can reduce the risk of complications.