*Note: Frequency of infusions will vary for participants based on their initial amyloid levels. Participants with elevated amyloid levels will receive infusions every two weeks for the first 96 weeks of the study—about 20 months—and every four weeks after that. Participants with intermediate amyloid levels will receive infusions every four weeks throughout the trial.
**Note: At different points in the study, participants take a Positron Emission Tomography brain scan, also known as a PET scan, to identify amyloid and tau (another protein) in the brain. The PET scan captures pictures of participants’ brains that let researchers see and track any changes that may occur.