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An Ultrasound Experiment Tackles a Giant Problem in Brain Medicine

Medicare Officially Limits Coverage of Aduhelm to Patients in Clinical Trials

Inside a Campaign to Get Medicare Coverage for a New Alzheimer’s Drug

Medicare Proposes to Cover Aduhelm Only for Patients in Clinical Trials

Decision Looms That Could Determine Fate of Alzheimer’s Drug

House Committees Demand F.D.A. Records on Alzheimer’s Drug Approval

Cleveland Clinic Says It Won’t Administer Aduhelm to Patients

F.D.A. Requests Federal Investigation of Alzheimer’s Drug Approval

In a Reversal, F.D.A. Calls for Limits on Who Gets Alzheimer’s Drug

A New Alzheimer’s Drug Offers More Questions Than Answers

Many Alzheimer’s Experts Say Use of Aduhelm Should Be Sharply Limited

F.D.A. Still Lacks a Permanent Chief, Despite Pressing, Weighty Problems

Three F.D.A. Advisers Resign Over Agency’s Approval of Alzheimer’s Drug