Figure 2From: Improvement of different vaccine delivery systems for cancer therapyLive/non-live delivery systems. Live or biological gene delivery systems include viral and/or bacterial vectors. Non-live or non-biological delivery systems mainly include cationic lipids/liposomes, polysaccharides and cationic polymers, micro-/nano-particles, cationic peptides and cell-penetrating peptides (CPP).Back to article page