1. The document discusses delivering AAV2 gene therapy for Parkinson's disease through convection-enhanced delivery (CED), which uses a syringe pump to generate pressure and spread the vector throughout the targeted striatal area. 2. It examines delivering different doses of AAV2-hAADC, ranging from 6 to 500 units per hemisphere, to animal models and evaluating clinical responses and vector distribution up to 6 months later using various analysis methods. 3. The highest dosage group showed large discrepancies and no antibody response was detected, suggesting a potential delivery problem rather than immunogenicity issues.