#$%^&*AU2018202973A120180517.pdf#####ABSTRACT A composition comprising mesoporous silica rods comprising an immune cell recruitment compound and an immune cell activation compound, and optionally 5 comprising an antigen such as a tumor lysate. The composition is used to elicit an immune response to a vaccine antigen.1/28 20 gm* EHT =10.75 kV Signal A =SE1 Sample ID Peltier Temp 20.0 C Mag = 1.04 KX WD 19.0 mm Chamber 1.33e-003 Pa Humidity 0.0% FIG. 1 90%- E MHCll+ o 80%- 0 CD86+ u 70%x60%'50%40%E 30%20%10%0%- - -r " Control 2 pm 30 pm 100 pm CpG FIG. 2