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CD4+ and CD8+ T cells in the blood of the experimental chickens on the 14th and 28th dpv. (a) The percentage of CD4+ T cells in the peripheral blood of the experimental chickens. (b) The percentage of CD8+ T cells in the peripheral blood of the experimental chickens. (c) The CD4+/CD8+ ratio. Tukey’s multiple comparison test was used for statistical analysis; * p < 0.05, *** p < 0.001.
