Battling Cervical Cancer: DNA Test More Effective Than Pap Smear

A DNA test that detects the human papillomavirus, which causes cervical cancer, is more effective than Pap smears at detecting and preventing the disease, according to a new study published in the New England Journal of Medicine. "Good Morning America" medical contributor Dr. Marie Savard explains the difference between the two procedures and what it means for health. How is this DNA test different from a Pap smear? And why is it more effective? Pap smears check for cell changes caused by...Full Story
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