Shingles vaccine in adults 70+ linked to slower aging, study finds.

A new study published January 20, 2026, finds that shingles vaccination in adults 70 and older is linked to slower biological aging, based on seven aging markers including inflammation, immune function, and epigenetic changes. Analyzing data from over 3,800 U.S. adults, researchers observed that vaccinated individuals showed reduced signs of aging up to four years post-vaccination, even after adjusting for health and demographic factors. The results suggest the vaccine may help lower chronic inflammation, known as "inflammaging," and support healthier aging, though mechanisms remain unclear. The study, supported by the National Institute on Aging, adds to evidence that vaccines may promote longevity beyond preventing infection.