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New K Flu Variant Surges, Vaccine Still Effective

1/7/2026

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Flu Variant Surge

The subclade K flu variant is driving a surge in U.S. cases.
The variant emerged after the vaccine composition was finalized, creating a mismatch.
Health officials note that despite the mismatch, the vaccine still provides significant protection against severe illness and complications.
Current data show the 2025-26 flu vaccine is 70-75% effective for preventing hospitalizations in children and 30-40% in adults.
Vaccination remains crucial as flu activity rises.

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Vaccines Reduce Dementia

Recent research suggests routine vaccinations, especially against flu and shingles, may lower dementia risk in adults aged 50 and older.
A review of more than 100 million people linked the shingles vaccine to a 24% reduction in dementia risk and a 47% reduction in Alzheimer's disease risk.
Public health experts say the findings warrant further studies to validate results and could inform long-term dementia protection.

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Flu Variant Surge

The subclade K flu variant is driving a surge in U.S. cases.
The variant emerged after the vaccine composition was finalized, creating a mismatch.
Health officials note that despite the mismatch, the vaccine still provides significant protection against severe illness and complications.
Current data show the 2025-26 flu vaccine is 70-75% effective for preventing hospitalizations in children and 30-40% in adults.
Vaccination remains crucial as flu activity rises.

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