A fluid delivery manifold system assembled and configured to allow delivery of a single dose of a therapeutic agent (e.g., vaccine, drug, medicament, etc.) from a Blow-Fill-Seal (BFS) vial to a patient. The delivery assembly generally includes a modular manifold design consisting of separately constructed components cooperatively arranged and coupled to one another. The modular manifold construction allows for rapid manufacturing reconfigurations of one or more components with minimal costs to create new delivery manifold configurations that meet specific needs (i.e., different modes of delivery depending on agent to be delivered, such as subcutaneous, intramuscular, intradermal, intravenous injection, spray, or droplet delivery).