["alzheimer's disease"]
['placebo']

        Inclusion Criteria:

          -  Diagnosis of mild Alzheimer's Disease

          -  Mini-Mental State Examination (MMSE) scores between 20 and 26 (inclusive)

          -  Clinical dementia rating (CDR) scores of 0.5 or 1

          -  Other inclusion criteria apply

        Exclusion Criteria:

          -  Clinically significant neurological disease other than Alzheimer's disease

          -  Major psychiatric disorder

          -  Severe systemic disease

          -  Serious adverse reactions to any vaccine

          -  Other exclusion criteria apply
      