Laura LeBlanc

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Five things you need to know about mammograms

A new study suggests that mammograms are not as helpful in extending breast cancer survival rates as we think. Correspondent Dr. Emily Senay will tell us what we need to know about the new study, and what the controversy means for health policy.

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Reshaping Somerville: The fight against childhood obesity

Need to Know medical correspondent Dr. Emily Senay travels to Somerville, Massachusetts, where town officials have pioneered a new anti-obesity program that’s producing promising results.

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Video: Eating fresh in Somerville

Need to Know talks to one mom about how her local greenmarket has made family life a little more fruitful.

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Preventing childhood obesity

After spending some time in Somerville, Mass., reporting on their innovative program to prevent childhood obesity, Need to Know came back with some tips on how to make sure your kids reach adulthood at a healthy weight.

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Video: Blood test: What you don’t know about blood

Since World War ll, blood has been considered “the gift of life.” But today a growing number of experts are questioning whether blood transfusions should be so widely used.

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Video: 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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Video: 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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Video: Uncharted waters: The spill and human health

How serious are the short- and long-term health risks for clean-up workers? Need to Know talks to BP, leading scientists and Louisiana state health officials to find answers.

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Video: The Gulf oil spill and its potential health effects

Need to Know spoke with George Jackson, a fisherman in Hopedale, La., who has complained of burning eyes and dizziness