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High-Dose Flu Vaccine Halves Alzheimer's Risk
7 Apr
Summary
- High-dose flu shots significantly lowered Alzheimer's risk in seniors.
- The risk reduction was nearly 55% over a two-year period.
- Enhanced flu vaccines may reduce inflammation linked to neurodegeneration.
A retrospective cohort study revealed a significant link between high-dose influenza vaccination and a reduced risk of Alzheimer's disease. Researchers analyzed data from approximately 165,000 older adults, finding that those who received the high-dose vaccine experienced a nearly 55% decrease in Alzheimer's disease risk over approximately two years.
This finding is an extension of earlier research by the same team, which indicated that standard-dose flu vaccines were associated with a 40% reduced risk of Alzheimer's over a four-year timeframe. The high-dose vaccine contains four times the antigen compared to standard versions, intended to elicit a stronger immune response.
The study's authors propose that these enhanced flu vaccines offer greater protection against influenza infection. By doing so, they may decrease the risk of severe illness and the subsequent systemic inflammation that is believed to promote neuroinflammation and neurodegeneration.
