Anyone who has had chickenpox in the past can get shingles. When you consider that 99% of people 40 years and older have had chickenpox (even if they don’t remember it), a large portion of the population is at risk. That risk is even greater for people who have weak immune systems, but also in people who are 50 and older. People over age 60 account for half of cases even when they are not immunocompromised.