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The annual Alzheimer’s research meeting known as CTAD was supposed to be a snoozefest this year. That all changed six weeks ago, when Biogen stunned the medical world by bringing an Alzheimer’s drug back from the dead — and vowed to make a detailed scientific case for the decision at the gathering this week.

On Thursday morning, Biogen will give that highly anticipated presentation — livestreamed here — detailing data from two late-stage clinical trials of its drug, known as aducanumab. It will be the highlight of CTAD, short for Clinical Trials on Alzheimer’s Disease.

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