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Results of the competitive ELISA kits showing NP- and H5-specific seroconversion of the seropositive mallards and one contact duckling that survived a challenge infection with HPAIV H5N8B (A) and of the seronegative Pekin ducks serving as infection control group with contact ducklings (B). Lines represent the median. Inhibition of less than 45% for NP and of 50% for H5 is regarded as seropositive. NP = Nucleoprotein.
