Good news about the treatment of Alzheimer’s disease is hard to find. However, new breakthrough research is hailed as the “best news” in dementia research for 25 years and a potential “game changer” for people with the disease. In a preliminary trial a bioengineered medication called aducanumab has demonstrated the ability to clear accumulations of beta-amyloid proteins—a hallmark of Alzheimer’s—from the brain. Compared with subjects receiving a placebo medication, those who got monthly infusions of aducanumab in high doses appeared to experience less progressive loss in mental function.