Chicken pox virus
Shingles is a reactivation of chicken pox.
After recovery from chicken pox, the virus stays dormant in a nerve root. It can then be reactivated as shingles at a later date. If someone has never had chicken pox, they can get them from someone who has shingles and should avoid them. If you have had chicken pox (or the vaccine), you are safe and there is no need to take any precautions.
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