“…In addition, adjuvants in Group (III) act as immunostimulators (e.g., muramyl dipeptide (MOP), monophosphoryl lipid A [MPL], Freund's complete adjuvant, lipopolysaccharide, cytokines, and lipid A; de Souza Apostólico, Lunardelli, Coirada, Boscardin, & Rosa, 2016). Immunostimulatory (Immunopotentiator) adjuvants, which increase the immunogenicity of specific allergens, while not being pharmacologically active themselves, have been used for many years in SIT vaccines (Reisacher & Schwanke, 2016). However, some compounds can act by more than one mechanism concurrently (Aguilar & Rodriguez, 2007; Perrie et al, 2008).…”