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Anti-MV HA isotype of antibodies induced in BALB/c, DBA/2 (H-2d), C3H (H-2k), and C57/Black (H-2b) mice immunized with 0.5, 2, or 5 μg of pV1J-HA by epidermal gene gun. Sera were collected 3 weeks after the immunization. Sera from mice immunized with a control pV1J had means ± standard deviations of 158 ± 198 ng/ml for IgG1 anti-HA antibodies (n = 11) and 10 ± 18 ng/ml for IgG2a anti-HA antibodies (n = 11). Data represent individual animals.
