Medical Lessons

The number of people living with cystic fibrosis in the U.S. is 30,000, according to the Cystic Fibrosis Foun­dation, so the FDA’s approval applies to approx­i­mately 1,200 indi­viduals — the 4% — who carry the G551D mutation.

See more Notes on Kalydeco, the New Cystic Fibrosis Drug