Abstract: The invention provides a method, system, process, vaccine, or device for activating an immune response against a tumor. In particular, in one embodiment, the invention for activating an immune response in situ against a tumor comprises introducing one or more delivery devices having a morphology that prioritizes one or more prioritized cell types which interface with the one or more delivery devices. In another embodiment, the invention provides a method of vaccinating to activate the innate immune system of a subject which comprises administering a vaccine comprising a composition selected from a group consisting of: a selection factor, an antigenic target, an immunogenic enchancing factor, and combinations thereof.