Peptides map to assess antibodies of chicken after vaccination with Osr2HN, OsrHN, and LaSota inactivated vaccine. (A) Scheme of overlapping peptides. (B) Comparison of antibodies produced by the Osr2HN, OsrHN, and LaSota inactivated vaccine. (C) Epitope map of Osr2HN, OsrHN, and LaSota inactivated vaccine. The shade of color is positively correlated with the ELISA OD value. (D) The NA inhibition titer of antibody induced by the Osr2HN, OsrHN, and LaSota inactivated vaccine. (E) Inhibitory effects of purified antibodies induced by three vaccines on virus infection. (F) Inhibitory effects of purified antibodies induced by three vaccines on virus release.