A graphical overview of the influence of the protein-to-lipid-mass ratios on the vaccine system. Different physical states observed for the vaccine system: A) Lysozyme and DDA/TDB liposomes: No measurable positive interaction. B) At low concentrations of BSA/ovalbumin and DDA/TDB liposomes: No detectable aggregation (all the protein is adsorbed). C) Intermediate concentrations of BSA/ovalbumin and DDA/TDB liposomes; Aggregation and partial adsorption of the protein. D) High concentrations of BSA: The liposomes are stabilized by a protein corona and protein is present in bulk