Why is age considered a risk factor for herpes zoster (shingles)?

Updated: Jan 25, 2019
  • Author: Camila K Janniger, MD; Chief Editor: Dirk M Elston, MD  more...
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Answer

In the United States, approximately 95% of adults—and 99.5% of adults aged 40 years or older—have antibodies to VZV and thus are vulnerable to reactivation of infection. [44] A person of any age with a previous varicella infection may develop zoster, but the incidence increases with advancing age as a consequence of declining immunity.


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