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Brazil has launched a massive vaccination campaign to protect against a disease that has killed hundreds of people. But it's facing huge challenges, including a shortage of the yellow fever vaccine.

First-year medical students are usually busy studying lots of basic science and medicine. One medical school is making a point of schooling them on how health care delivery affects their patients.

In his new book, researcher Martin Gibala explains that workouts with periods of intense exercise aren't just for the super-fit. They also help make the most of limited workout time.

In his new book, researcher Martin Gibala explains that workouts with periods of intense exercise aren't just for the super-fit. They also help make the most of limited workout time.

Gratitude is linked to better physical and mental health. But some people are wired in a way that they place less value on it. And quickie exercises to boost gratefulness may not pay off.

A woman with foot pain was floored by the high cost of titanium screws used in her surgery. "Unless the metal [was] mined on an asteroid, I do not know why it should cost that amount," she said.

Researchers at the UC San Diego School of Medicine announced Thursday that microbes can be used to provide a relatively accurate estimate of the time of death in decomposing human bodies.

Independent analysts agree that the North's latest ICBM could reach as far as the U.S. Eastern Seaboard, though some questions remain.

There are more than 200,000 cases in Yemen, a war-ravaged country whose health system is collapsing. We asked specialists what needs to happen to bring the disease under control.

Josephine Majani passed out searching for help as she delivered her baby on a the floor of a hospital in Kenya. She hopes her case will push for reforms in treatment of women during childbirth.