Replimune shares plummeted 40% on concerns FDA scientists are still skeptical of its melanoma drug.[6190728][6194059] Meanwhile, ProMIS Therapeutics saw a surge in stock price after announcing promising results for its Alzheimer's disease treatment.[6190728][6194059] The FDA reviewers' criticism of Replimune's data has raised concerns about the company's ability to secure approval for its melanoma treatment.[6190728][6194059]