NEW YORK (AP) — Shares of Vertex Pharmaceuticals Inc. soared more than 50 percent in premarket trading Tuesday after the drugmaker said its treatment for cystic fibrosis appeared to work better than a placebo in a late-stage study.
Cystic fibrosis is a rare inherited disease that causes thick mucus to form in the lungs and other organs. Vertex said its treatment helped improve lung function for the people over 12 years old with the most common form of the disease who took part in the study. The treatment was a combination of t...
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