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F.D.A. Approves New Cystic Fibrosis Drug
New York Times

The first drug that treats an underlying cause of cystic fibrosis, rather than just the symptoms, was approved by the Food and Drug Administration on Tuesday, more than 22 years after the gene responsible for the disease was first identified.

The drug, called Kalydeco and developed by Vertex Pharmaceuticals, counters the effect of one specific mutation in the gene that accounts for 4 percent — or about 1,200 — cystic fibrosis cases in the United States.