A new study suggests that getting vaccinated against shingles may do more than prevent a painful rash, it could also reduce the risk of developing dementia. Researchers at Stanford University found that older adults who received the shingles vaccine lowered their risk of developing dementia over the following seven years by 20%.
The findings add to growing evidence that preventive health measures, including vaccinations, may play an important role in protecting brain health. Notably, the study found that women appeared to benefit even more from the shingles vaccine. This is especially significant because women are at higher risk of developing dementia.
Shingles is caused by the same virus responsible for chickenpox. Nearly everyone born before 1980 carries the virus, which can remain dormant for decades before reactivating later in life when the immune system weakens. The Centers for Disease Control and Prevention (CDC) recommends that adults age 50 and older receive the newer, more effective shingles vaccine. About one in three Americans will develop shingles in their lifetime.
The research aligns with findings presented at the 2024 Alzheimer’s Association International Conference, which highlighted additional benefits of routine vaccinations. Studies of nearly two million people found that individuals who received at least one flu vaccine reduced their Alzheimer’s risk by 17%, with additional reductions seen among those vaccinated more consistently. Pneumonia vaccination between ages 65 and 75 was linked to up to a 40% lower Alzheimer’s risk, depending on genetic factors.
Health experts say these findings underscore the broader value of vaccines. Beyond preventing infections, annual vaccinations may reduce long-term risks for Alzheimer’s disease, cardiac events, and diabetes-related hospitalizations.
With more than 236,000 Ohioans age 65 and older living with Alzheimer’s disease, preventive steps such as vaccination may offer a simple yet powerful tool to support lifelong brain health.
For more information about Alzheimer’s disease or related dementias, visit alz.org or call the Alzheimer’s Association 24/7 Helpline at 800-272-3900. In Northwest Ohio, individuals can also contact the local chapter at 419-537-1999 to schedule a free care consultation and connect with community resources.
