Top stories in health and medicine, September 13, 2012

This series is brought to you by MedPage Today.

1. More People Had Health Insurance Last Year. The percentage of Americans without health insurance fell from 16.3% in 2010 to 15.7% in 2011.

2. Pertussis Vax Loses Power Over Time. Protection from the five-dose childhood series of the diphtheria, tetanus, and acellular pertussis (DTaP) vaccine fades within 5 years of the last dose.

3. ‘Obesity’ Gene May Lower Diabetes Risk. A lone genetic mutation appears to simultaneously enhance insulin sensitivity while increasing the risk of obesity.

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