In the majority of cases, drug carriers constitute more than 90% fractions of the drug formulation. In the context of immunotherapy, these carriers may be constructed with immunostimulatory materials to leverage the pharmacological activities of active drugs. Some carrier materials including cationic polymers, polar lipids, or inorganic compounds have been demonstrated to activate innate immune cells or cause immunogenic cell death. It is of great interest of the lab to design immunoactive drug carriers using immunostimulatory biomaterials.