Corbus Pharmaceuticals Holdings Inc’s experimental drug for cystic fibrosis, a rare lung-scarring disease, could be a real money spinner and pose a challenge to rival Vertex Pharmaceuticals Inc’s successful treatment, Kalydeco.

Corbus, a small biopharmaceutical company, received $5 million from the Cystic Fibrosis Foundation last month to develop the drug, Resunab, and expects to begin a mid-stage study this quarter.

The company hopes Resunab will treat every patient suffering from the disease, compared with Kalydeco, which has approval to treat a small section of patients. The disease currently affects 70,000 people worldwide.

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