The present invention relates to formulations, methods and devices for delivering one or more biologically active agents, particularly a diagnostic or therapeutic agent to the intradermal compartment of a subject's skin. The present invention provides an improved method of delivery of biologically active agents in that it provides among other benefits, rapid uptake into the local lymphatics, improved targeting to a particular tissue, improved bioavailability, improved tissue bioavailability, improved tissue specific kinetics, improved deposition of a pre-selected volume of the agent to be administered. This invention provides methods for rapid transport of agents through lymphatic vasculature accessed by intradermal delivery of the agent. Methods of the invention are particularly useful for delivery of diagnostic and therapeutic agents. The invention relates to the synergy gained in diagnosing and treating disease when intradermal delivery and controlled release materials are combined. Specifically, the synergy is achieved when intradermal delivery is combined with lipid based particles.