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Varicella zoster virus (VZV) DNA copies per milliliter of saliva in individuals with zoster, postherpetic neuralgia (PHN), and no history of zoster (control). The mean (± SD) VZV DNA copy number per milliliter of saliva for all positive samples was 627 ± 375 copies/mL in individuals with a history of zoster, 397 ± 438 copies/mL in individuals with PHN, and 783 ± 1 copies/mL in individuals with no history of zoster.
