The invention is a single use delivery device capable of delivery of an agent (e.g., vaccine, drug, medicament, etc.) in a controlled manner and without requiring specialized skill in administering delivery of such agent. The delivery device is configured to be filled on-site and in the field with a dose of an agent, while remaining sterile and preventing the potential for contamination during the filling process. The delivery device is further configured to be rendered incapable of reuse following receipt of a fluid agent from a source and subsequently following its intended use of delivering the fluid agent to a patient, thereby preventing reuse of the device and reducing the risk of the spreading blood-borne diseases through reuse.
