Shingles vaccine linked to 20% lower dementia risk in groundbreaking study

A new study from Heidelberg University suggests that the shingles vaccine could help lower the risk of dementia. Researchers found a clear link between vaccination and a reduced chance of developing the condition, especially in women. The findings add to growing evidence that infections and environmental factors play a role in dementia progression.

The study focused on a natural experiment in Wales, where shingles vaccination eligibility depended on birthdates. Those born on or after September 2, 1933, received the vaccine, while others did not. Results showed a 20% lower dementia risk among vaccinated individuals, with women benefiting the most. Similar trends have been observed in Australia, Canada, the US, Sweden, the Netherlands, Great Britain, and Florida.

A separate long-term study by Johns Hopkins University found that cognitive training could also make a difference. Just five to six weeks of mental exercises reduced dementia risk by 25%—even two decades later.

Meanwhile, research from Emory University highlighted the dangers of air pollution. Long-term exposure to fine particulate matter was linked to a higher risk of Alzheimer's. Pollution not only harms the heart but also triggers brain inflammation, further increasing dementia risk.

Experts continue to stress the importance of a healthy lifestyle. Controlling blood pressure, diabetes, and cholesterol, avoiding smoking and heavy drinking, staying active, and keeping the mind engaged remain key to prevention.

The shingles vaccine study reinforces the idea that infections and environmental factors influence dementia risk. Alongside vaccination, cognitive training and pollution control could play a role in reducing cases. Health officials still emphasise lifestyle changes as the most effective way to lower the chances of developing dementia.