In recent years, attenuated intracellular bacteria have elicited great concerns as vehicles for DNA vaccine delivery. DNA vaccines can be directly delivered into antigen presenting cells (APCs) by this means.

• 近年来，应用减毒胞内菌作为DNA疫苗的运送载体受到广泛关注，由于该途径可以通过减毒胞内菌将DNA疫苗定向运送至抗原提呈细胞(APCs)内，因而大大提高了DNA疫苗的摄入效率。