Diseases, Conditions, Syndromes

More doubt on virus, chronic fatigue connection

A study supported by the U.S. Department of Health and Human Services could not validate or confirm previous research findings that suggested the presence of one of several viruses in blood samples of people living with chronic ...

Diseases, Conditions, Syndromes

Understanding and preventing gangrene

Dear Mayo Clinic: I have heard that a stubbed toe can lead to gangrene in some individuals. Is that true? What are the signs of gangrene, and how can it be avoided?

Medical research

Donated hearts may beat much longer

New technology increases the length of time that a human heart can remain viable for transplant after removal from a donor for transplantation.

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