Shingles is a painful rash, caused by the same virus as chickenpox, and not something you really want to experience. While more common in adults 50+ as their immune system begins to weaken, younger people can also be affected.
There's a new shingles vaccine, Shingrix, that has been on the market for about one year and the CDC is recommending it for people 50 years and older, even for those who have been previously vaccinated with another product. For my age group (50-69), it offers 97% protection, way better than the previous vaccine, but does require two injections, with the second coming not less than two months, and not more than six months, from the first shot.
Compared to my memories of shots in my pre-teen years that induced tears at the very thought, today's are barely more than a small prick and no excuse to avoid what's good for you.