The present invention provides methods and compositions for the stimulation of immune responses. In particular, the present invention provides nanoemulsion compositions and methods of using the same for the induction of immune responses (e.g., immunologic cell death/apoptosis (e.g., for the induction of innate and/or adaptive immune responses)). Compositions and methods of the invention find use in, among other things, clinical (e.g. therapeutic and preventative medicine (e.g., for infectious disease, cancer, autoimmunity, and/or tissue injury (e.g., via alteration of host immune responses))) and research applications.