Herpes Zoster (Shingles)
What is it?
Shingles, also known as herpes zoster (HZ), is an illness caused by the reactivation of the varicella zoster virus, the same virus that causes chickenpox. Reactivation of the virus causes a painful skin rash with blisters on one side of the body, often in a strip. The illness can be serious and severe in some people.