A Phase 3 Study Evaluating Safety and Effectiveness of Immune Globulin Intravenous (IGIV 10%) for the Treatment of Mild-to-Moderate Alzheimer´s Disease

Study visits: Each participant will be tested at the investigational site, and if qualified,
will be treated intravenously (through a vein) every two weeks for 70 weeks (approximately 18
months). The first three infusions must be done at the site, but if the infusions are well
tolerated, subsequent infusions may be done by a qualified healthcare provider in the home or
other suitable location. Each participant must return to the site every 3 months for
evaluation of cognition as well as blood tests and scans of the brain.

Main Inclusion Criteria:

- Written informed consent - participant (or participant´s legally acceptable
representative) and caregiver who are willing and able to participate for the duration
of the study

- Diagnosis of probable Alzheimer´s Disease (AD)

- Dementia of mild to moderate severity defined as mini-mental state examination (MMSE)
16-26 inclusive at the time of screening

- Neuroimaging (computed tomography [CT] or MRI) performed after symptom onset
consistent with AD diagnosis

- Ability to comply with testing and infusion regimen, including fluency in English or
Spanish, adequate corrected visual acuity and hearing ability

- On stable doses of regulatory authority approved AD medication(s) for at least 3
months prior to screening. These medications must be continued throughout this study.

- If receiving psychoactive medications (e.g. antidepressants other than monoamine
oxidase inhibitors (MAOIs) and most tricyclics, antipsychotics, anxiolytics,
anticonvulsants, mood stabilizers, etc), must be on stable doses for at least 6 weeks
prior to screening

Main Exclusion Criteria (Reasons why it might not be appropriate to participate):

- Any other forms of dementia

- Medical issues that might increase the risk of treatment with IGIV, 10%, such as:

1. Significant problems with blood pressure, heart disease, clotting disorders,
strokes or recent heart attacks

2. Evidence of current bleeding in the brain by MRI

3. Serious problems with the liver or kidneys

4. Allergies to blood products

- Medical issues that might interfere with the evaluation of the treatment of dementia
or might make dementia worse, such as:

1. Diabetes

2. Recent treatment with chemotherapy or immune suppression

3. The recent use of other investigational drugs, especially antibody therapy for AD

4. Severe headaches or psychiatric problems