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SNRs of immune sera from JD/17- or JD-cHA/17-vaccinated chickens (n = 5) detected by H7-12 peptide chip. Each reaction was repeated 3 times, and SNRs are expressed as mean values ± standard deviations. Unpaired Student’s two-sided t test was employed to determine the differences between the two groups. **, P < 0.01.
