Varicella zoster virus

Varicella zoster virus (VZV) is one of eight herpesviruses and is only known to infect humans. It causes chickenpox in children, teens and young adults and herpes zoster (shingles) in adults and rarely in children.

Lyme Disease
Several herpesviruses including varicella-zoster virus may cause false positives on Lyme Disease tests.

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 * Wikipedia - Varicella zoster virus