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  1. Health & Medicine

    Stem Cell Snag: Implanted cells may show signs of Parkinson’s

    After as many as 16 years, nerve cells transplanted into the brains of Parkinson's patients still thrive, but some show signs of acquiring the disease.

    By Patrick Barry
  2. Health & Medicine

    Virus Reprise: Mumps outbreak in 2006 was largest in 20 years

    Mumps infected more than 6,500 people in the United States in 2006, the largest outbreak in 20 years.

    By Nathan Seppa
  3. Health & Medicine

    Body and Brain: Possible link between inflammation and bipolar disorder

    Inflammatory genes create a signature for bipolar disorder in some people.

    By Tina Hesman Saey
  4. Animals

    Antibiotic Alligator: Promising proteins lurk in reptile blood

    Scientists are zeroing in on alligator blood proteins that show promise for fighting disease-causing microbes.