Shingles Vaccination Linked to Slower Biological Aging and Reduced Chronic Inflammation in Older Adults

New USC study finds the shingles vaccine may slow biological aging and reduce chronic inflammation in adults over 70. Explore how vaccines impact "inflammaging."

By: AXL Media

Published: Feb 26, 2026, 5:52 AM EST

Source: The information in this article was sourced from University of Southern California

Beyond Infection: The Multi-Dimensional Benefits of Vaccination

A groundbreaking study from the USC Leonard Davis School of Gerontology indicates that shingles vaccination may serve as a strategic tool for promoting longevity and systemic health. Analyzing data from the U.S. Health and Retirement Study, researchers observed that seniors who received the shingles shot exhibited markers of biological systems that functioned as if they were younger than their chronological age. While the primary purpose of the vaccine is to prevent the reactivation of the varicella zoster virus, these findings suggest a broader impact on the body’s fundamental aging mechanisms, adding to a growing body of evidence that adult immunizations may protect against more than just acute illness.

Combating the "Inflammaging" Phenomenon

The research team specifically highlighted the vaccine’s role in reducing "inflammaging," the persistent, low-grade inflammation that typically accumulates as humans age. This chronic inflammatory state is a known precursor to debilitating conditions such as cardiovascular disease, frailty, and cognitive decline. By potentially suppressing the subclinical reactivation of latent viruses, the shingles vaccine appears to calm the body's background immune responses. Jung Ki Kim, the study’s lead author, suggests that by modulating these biological systems, the vaccine helps maintain a more resilient physiological state, preventing the systemic "wear and tear" that characterizes rapid aging.

Measuring Biological Vitality Through Seven Key Markers

To determine the pace of aging, scientists evaluated seven distinct biological domains rather than relying on birth dates alone. These metrics included innate and adaptive immunity, cardiovascular blood flow, neurodegeneration, and complex genetic activities such as epigenetic and transcriptomic aging. Vaccinated participants consistently outperformed their unvaccinated peers across these categories. Epigenetic aging, which measures the chemical "switches" that turn genes on or off, was notably slower in those who had been immunized, indicating that the vaccine helps preserve the youthful function of cellular instructions.