At the Cleveland Clinic, technician Larry Raber and physician Mei Lu practice the ultrasound technique to measure CCSVI in patients with MS on medical student Claudiu Diaconu. Cleveland Clinic Center for Medical Art & Photography hide caption

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Doctor Challenges Cause Of MS And Treatment

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Emergency personnel attend to a shooting victim outside a Safeway in Tucson, Ariz. Rep. Gabrielle Giffords (D-AZ), and others were shot as the congresswoman was meeting with constituents. First responders to the scene used special first aid kits to help treat victims until medical personnel arrived. James Palka/AP hide caption

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In Tucson's 'Silent Chaos,' Rare Medic Kits Were Key

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Berkeley's Latest Liberal Cause: Sex Changes

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In San Antonio, Wounded Troops Find Treatment

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A traveler passes an automated external defibrillator at O'Hare International Airport in Chicago. Tim Boyle/Getty Images hide caption

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Gabrielle Giffords traveled by ambulance, private jet and helicopter from the University Medical Center in Tucson to a rehabilitation hospital in Houston on Friday. John Moore/Getty Images hide caption

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Giffords Begins A New, Arduous Phase Of Recovery

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Larynx Transplant On Calif. Woman Successful

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Antibiotics Defeat Ear Infections In Young Kids, Studies Find

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A study that measured antibodies and the disease history of more than  200 kids found that two doses of vaccine were 98 percent effective in  preventing chickenpox compared with 86 percent for a single dose. AP hide caption

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To Beat Chickenpox, 2 Shots Of Vaccine Are Best

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