Fig. 2From: Ducks induce rapid and robust antibody responses than chickens at early time after intravenous infection with H9N2 avian influenza virusAntibody response in chickens and ducks intravenously infected with inactivated H9N2 virus. a and c An HI assay was used to test the serum samples of the birds at different time points post-infection as indicated. b and d A blocking ELISA was used to test the serum samples of birds at different time points post-infection as indicated;**, p < 0.01. a and b present the samples collected at the indicated time points in the same infection experiment. c and d represent the samples collected at different time points post-infection as indicated in another duplicate independent infection experimentBack to article page