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. Author manuscript; available in PMC: 2017 Aug 14.
Published in final edited form as: Vaccine. 2011 Apr 2;29(23):4003–4007. doi: 10.1016/j.vaccine.2011.03.067

Fig. 2.

Fig. 2

NP serum antibody levels induced by VLP vaccine, inactivated whole virus vaccine, or AIV infection by NP ELISA. SPF chickens were immunized with 20 μg of VLP antigen with ISA70 adjuvant (A) or whole virus inactivated vaccine (B). Antibody levels were determined by NP-cELISA at 3 weeks post vaccination. AIV infected (C) sera were collected at 2 weeks post H9N2 virus challenge. Each bar represents the NP specific antibody value of each chicken.