
Biotech investors wary as FDA shifts stance on rare-disease drugs
Over the past year the FDA has denied or discouraged at least eight drug applications, including UniQure’s Huntington’s gene therapy and Regenxbio’s Hunter syndrome, and even reversed course on Moderna’s flu vaccine review, prompting investors to doubt whether the agency’s rare-disease flexibility will endure and to worry about the fate of other pipeline drugs; upcoming decisions (e.g., Denali Therapeutics) will test whether current standards remain consistent amid broader regulatory uncertainty.













