XK and influenza: Our previous publication showed that an ALFQ-adjuvanted composite influenza peptide vaccine comprising multiple highly conserved epitopes of HA, NA and Matrix (M1/M2/M2e) and delivered intramuscularly at a low dose of 1 μg per mouse generated a strong and balanced immune response with cross-neutralizing antibodies against Group 1 and Group 2 influenza viruses [14].