Health

 
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  The truth about blood

The Centers for Disease Control is tracking blood transfusions across the country to gauge the risks and benefits. Need to Know talks to one of the leaders of the new “hemovigilance” program.

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  The risks of transfusions

Members of the medical community are questioning how blood transfusions are used, and are concluding that, for many patients, the risks outweigh the benefits.

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Mississippi mayor leads charge against obesity epidemic

The adult obesity rate in Mississippi is the highest of any state. But one small-town mayor has made strides in improving the health of his community.

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  Timeline: The story of Avandia

A Need to Know chronology highlighting the history of the controversial diabetes drug Avandia, leading up to a big decision by the FDA on whether to pull it from the shelves.

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Money and medicine: The story of Avandia

Dr. Jerome Kassirer, former editor-in-chief of the New England Journal of Medicine, discusses the state of the FDA today, and the conditions that make it possible for drugs like Avandia, which may be pulled from the market, to reach consumers.

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  Malnutrition, the silent epidemic

Need to Know, in partnership with the photo agency VII, travels to countries hard hit by childhood malnutrition. It’s a crisis that is being called a silent epidemic and it affects a staggering 195 million children around the world.

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The rising rate of food allergies

Flawed testing may be at fault.

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Avandia on trial

Need to Know talks with Dr. Steven Nissen about the new reports linking the popular diabetes drug to an increased risk of heart failure.

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  Frank talk

Food designer Eugene D. Gagliardi Jr. speaks to Need to Know about his latest invention, which aims to make hot dogs safer for kids.