For the episode of South Park, see Chickenpox (South Park episode). Chickenpox, also spelled chicken pox, is the common name for Varicella simplex, classically one of the childhood infectious diseases caught and survived by most children. Chickenpox is caused by the varicella-zoster virus (VZV), also known as human herpes virus 3 (HHV-3), one of the eight herpes viruses known to affect humans. It starts with conjunctival and catarrhal symptoms, moderate fever and then characteristic spots ...
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