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Flu shots could reduce risk of Alzheimer’s and related dementia’s

Alzheimer’s and related dementia research finds

Flu shots could reduce risk of Alzheimer’s and related dementia’s.  A growing number of journal articles are finding a positive correlation between vaccinations and a reduced risk of Alzheimer’s disease and related dementia’s.

Multiple studies have found an association between higher vaccination rates and lower prevalence of Alzheimer’s disease.  Specifically these two studies published in 2023, one in 2022 and another in 2021. Researchers aren’t sure why this is happening.

One research team followed nearly 2 million people who were either vaccinated or unvaccinated against the flu. They found that, among the 935,887 people in each group, a yearly flu shot reduced the risk of dementia by 20% over four to eight years.

From the Studies vaccine shots reduce risk of Alzheimer’s

Mounting evidence indicates that systemic immune responses can have lasting effects on the brain.  Infections can influence Alzheimer’s disease risk and/or progression.  A diverse range of microorganisms and infectious diseases have been associated with an increased risks and the rate of cognitive decline, particularly among older adults, including influenza respiratory infections, pneumonia, herpes infections, chronic periodontitis, urinary tract infections, gastrointestinal infections], sepsis, and most recently COVID-19. Prevention or attenuation of microbe-related inflammation therefore represents a rational strategy.  Vaccination appears to delay or reduce the risk of neurodegenerative disease. Consistent with this hypothesis, studies have found a decreased risk of dementia associated with prior exposure to various adulthood vaccinations, including those for tetanus, diphtheria, pertussis (Tdap), poliomyelitis, tuberculosis, herpes zoster (i.e., shingles) and influenza.


It’s unclear why vaccinations for influenza, pneumococcal pneumonia and other infectious diseases might delay dementia.  A few emerging theories are that infectious agents factor into Alzheimer’s disease, meaning that vaccines’ efficacy could go beyond the intended effect, and that vaccines calm the immune system’s reaction to amyloid plaque buildup.

There is a good chance Flu virus vaccines have a Neurotropic effect.  This is an area for further research.

The currant Flu Shot, have you got your?

Flu shots could reduce risk of Alzheimer’s and related dementia’s