Treating Alzheimer’s has been a major issue for researchers, considering clinical trials that aim to treat the condition fail at a rate of 99.6 percent. Anything shown to remotely help will lead to big investments, as Biogen and Eisai learned on Thursday when they released positive results on their IND BAN2401. It’s not just a big deal because it could lead to a treatment, but also because it provides evidence we’ve figured out how the condition works. We think Alzheimer’s progresses from amyloid plaque accumulating between neurons, disrupting cell communication. The drug candidate doesn’t clean the plaque up, but it does clean up the cell clusters that form the plaque. Let’s hope this avenue of research provides more answers so we don’t end up spending $1 trillion on the condition by 2050.