You can only get
if you already had
and the dormant virus from the chickenpox infection becomes reactivated. Since only 20% of people who have had chickenpox develop shingles, researchers are still trying to determine what makes some people more likely to develop shingles than others.
Some of the factors that make people more likely to develop shingles include:
If you have a weakened immune system, you are more likely to develop shingles. Conditions that increase your risk include:
Medications and Procedures
Certain procedures and medicines may increase your risk, such as:
People over age 60 are more likely to develop shingles than younger people.
Caucasian people are more likely than African Americans to develop shingles.
Shingles. EBSCO DynaMed website. Available at:
. Updated August 20, 2012. Accessed September 7, 2012.
Shingles. American Academy of Family Physicians' FamilyDoctor.org website. Available at:
. Updated January 2011. Accessed May 30, 2013.
Shingles (herpes zoster). Centers for Disease Control and Prevention website. Available at:
. Updated January 10, 2011. Accessed September 7, 2012.
6/9/2014 DynaMed's Systematic Literature Surveillance
http://www.ebscohost.com/dynamed: Forbes H, Bhaskaran K, et al. Quantification of risk factors for herpes zoster: population based case-control study. BMJ 2014;348.