Vaccines may counter Alzheimer's disease. New position paper explains how

A recent position paper in the Journal of Alzheimer's Disease has highlighted the potential link between vaccines and a reduced risk of developing Alzheimer's disease. Despite the long-standing belief that abnormal protein clumps in the brain were the cause of Alzheimer's, researchers now suggest that these clumps are actually a result of the brain's response to infection.

The paper, authored by a panel of experts including Chuck Greenblatt of Hebrew University and Richard Lathe of the University of Edinburgh, emphasizes that vaccines can strengthen the immune system, potentially leading to a reduced risk of Alzheimer's. The researchers found that vaccine recipients are at a reduced risk of developing Alzheimer's disease, a finding replicated worldwide.

Although the link between pathogen infection and dementia, as well as between vaccination and dementia prevention, is correlational, the consistency of findings across various vaccine classes, populations, and study designs supports further investigation of immunopotentiation as a potential strategy for Alzheimer's prevention. The paper also discusses the possibility of "healthy vaccinee bias," but dismisses it by presenting three natural experiments that exclude the possibility of healthier individuals being more likely to get vaccinated.

The authors conclude that while the link between vaccines and Alzheimer's prevention is not yet proven, the evidence is strong enough to warrant further research into this potential strategy for preventing the neurodegenerative disease.