Varicella-zoster viruses recovered from 2 episodes of herpes zoster in an immunocompetent man were found to be different genotypes. The fact that the 2 isolates came from the same individual was confirmed by DNA fingerprinting. Immunity following chickenpox may not always protect against systemic reinfection. This finding raises questions about varicella-zoster virus pathogenesis and may have an impact on public health policy.
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Taha et al. (2006) studied this question.
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