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Anti-Gardasil® 9 antibody titers in mice. Mice were immunized with liquid (non-spray-dried), freshly spray-dried Gardasil® 9, or with PBS (control) and boosted with the same dose three-weeks after the first immunization. Sera were collected three weeks after the boost immunization and anti-Gardasil® 9 IgG titers were determined by ELISA.
