Brain imaging reveals migraine headache subtypes

They've been described as "brain on fire" or "an ice pick through the head." Migraine headaches affect more than one in 10 Americans, and they're so much worse than a regular headache.

WHO warns of more hantavirus cases in 'limited' outbreak

The World Health Organization said Thursday that more hantavirus cases could emerge after the disease killed three passengers from a cruise ship, but it expected the outbreak to be limited if precautions were taken.

Metformin's real power may be in the gut

For decades, physicians and scientists thought metformin, the leading type 2 diabetes medication taken by millions worldwide, mainly targets the liver to suppress glucose production. But a new Northwestern University study ...

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