VACCINE COMPOSITIONS

The present invention relates to a vaccine composition comprising an influenza Type A hemagglutinin stabilized stem nanoparticle (HA-ss-np); an aluminum hydroxide; a synthetic oligodeoxynucleotide adjuvant containing at least one CpG motif (CpG ODN); and a phosphate salt, wherein the HA-ss-np is not substantially adsorbed to the aluminum hydroxide, and wherein at least a portion of the CpG ODN is adsorbed to the aluminum hydroxide in the composition. The present disclosure also provides a method of inducing an immunological response against an influenza virus in a subject in need thereof, comprising administering an immunologically effective amount of the vaccine composition described herein. The present disclosure further provides a method of inducing an immunological response against an influenza virus in a subject in need thereof, comprising administering a dose of about 20 μg to about 300 μg of an HA-ss-np in a vaccine composition, wherein the vaccine composition further comprises an aluminum hydroxide; CpG ODN; and a phosphate salt, and wherein the HA-ss-np is not substantially adsorbed to the aluminum hydroxide, and wherein at least a portion of the CpG ODN is adsorbed to the aluminum hydroxide. Also provided herein is a method of producing a vaccine composition, comprising combining HA-ss-np with an adjuvant mixture, wherein the adjuvant mixture comprises a diluent solution comprising a phosphate salt; aluminum hydroxide; and CpG ODN, wherein the adjuvant mixture comprises CpG ODN-adsorbed aluminum hydroxide, and wherein the HA-ss-np is not substantially adsorbed to the aluminum hydroxide.