Immunology

Video: Why are people allergic to peanuts?

For 1 to 2 percent of the global population, eating a peanut butter and jelly sandwich could be potentially fatal. What makes peanut allergies so lethal, and why is the number of peanut-allergy sufferers on the rise?

Overweight & Obesity

Report: Global obesity costs hits $2 trillion

The global cost of obesity has risen to $2 trillion annually—nearly as much as smoking or the combined impact of armed violence, war and terrorism, according to a new report released Thursday.

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