Health

Researchers find that brains with more vitamin D function better

An estimated 55 million people worldwide live with dementia, a number that's expected to rise as the global population ages. To find treatments that can slow or stop the disease, scientists need to better understand the factors ...

Vaccination

COVID shots still work but researchers hunt new improvements

COVID-19 vaccinations are at a critical juncture as companies test whether new approaches like combination shots or nasal drops can keep up with a mutating coronavirus—even though it's not clear if changes are needed.

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