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Enzyme-linked immunosorbent assay antibody in groups of chickens vaccinated by live infectious bronchitis virus 793/B.08IR strain via drinking water, eye drops, and spray methods; bars representing mean values and standard errors of mean obtained for each group; asterisks indicating statistically significant differences: * P<0.05 and **** P<0.0001; asterisks directly above bars demonstrating statistically significant differences between vaccinated groups and control group of chickens.
