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The ratio of anti-HA specific IgG1/2a in DC immunization. The BM-DCs expressing HA were injected into mice (n = 5). For control, hydrodynamic injection of pCAGGS-HA was carried out (n = 4). After booster immunization, the ratio of anti-HA specific IgG1/2a was determined using flow cytomery analysis. Data represent means ± SE of each group.
