Figure 1.

(a) Schematic of aqueous ASE loading method. Porous microparticles containing trehalose‐stabilized Alhydrogel are fabricated and freeze‐dried. Microparticles are soaked in an antigen solution, antigen enters the pores and adsorbs to Alhydrogel. The solution is then mildly heated, healing the pores and entrapping the antigen. Microparticles can then be collected, washed, and utilized. (b) SEM images of porous ASE microparticles after fabrication and lyophilization (left), and after loading and partial self‐healing (right). Scale = 20 μm