Research and development in the field of neural exosome-based therapeutics for the treatment of neurodegenerative diseases; Research and development in the field of neural exosome-based platforms to harness the inherent properties of neural exosomes for their therapeutic and delivery capabilities; Research and development in the field of neural exosomes to transport a wide range of cargos including nucleic acids and proteins to treat a wide range of Central Nervous System (CNS) diseases, inflammatory diseases of the brain, and other auto-immune diseases of the brain caused by destruction of myelin and neuronal injury/death; Research and development in the field of neural exosomes, namely, to engineer exosomes to carry various biologically active drug molecules, target specific cell types or cellular pathways, and enhance the value of existing drug modalities; Research and development in the field of neural exosome platforms to reduce pro-inflammatory t-cells, increase anti-inflammatory t-cells, increase anti-inflammatory macrophages, decrease pro-inflammatory microglia, decrease acute and chronic inflammation, protect axons and neurons, and restore neuronal and myelin integrity for the treatment of Central Nervous System (CNS) diseases, inflammatory diseases of the brain, and other auto-immune diseases of the brain caused by destruction of myelin and neuronal injury/death; Research and development in the field of neural exosome platforms to transport a wide range of cargos including nucleic acids and proteins to treat a wide range of Central Nervous System (CNS) diseases, inflammatory diseases of the brain, and other auto-immune diseases of the brain caused by destruction of myelin and neuronal injury/death; Research and development in the field of next-generation neural exosomes to enhance blood-brain barrier penetration and/or enhance the properties of cell-targeting exosomes