Varicella zoster virus (VZV) is a DNA virus and a member of the herpes virus family. It is also known as human herpes virus type 3. Primary infection with VZV results in varicella, which is commonly known as chickenpox (CP), and mainly occurs in childhood. Following primary VZV infection, the virus migrates to the dorsal root or cranial sensory ganglia and remains there in a latent state. However, VZV may reactivate at a later stage in life, resulting in herpes zoster (HZ), which is commonly known as shingles.

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