At any one time, up to 30% of perfectly healthy people carry around the bacteria called Staphylococcus aureus, which lives in the human nose. In most cases, these bugs are harmless, but an antibiotic-resistant version is becoming more common, which is difficult to treat and can lead to pneumonia if it gets into the lungs. It can cause boils, abscesses, or serious infections of the skin. How can we protect ourselves?

Here’s how: First, there’s the old standby: wash your hands frequently, with soap and water for at least 15 seconds or with an alcohol-based rub. You also shouldn’t share personal items like razors or towels. Second–well,the headline tells the tale.

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