Alzheimer's disease research saw a decade of stagnation until FDA approved aducanumab in 2021. Since then, therapies like donanemab and lecanemab have shown promise. NKGen's SNK01, an NK cell therapy, and Longeveron's Lomecel-B, an MSC therapy, are in phase 2 trials, demonstrating efficacy and safety. Other novel therapies, including Biogen's BIIB080 and AAV2-BDNF gene therapy, are also in development.