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A Protein expression levels of proinflammatory cytokines in the nasal tissue. B Protein expression levels of proinflammatory cytokines in the olfactory bulb. C Body weight changes from day 0. Statistical analysis was performed using the Mann–Whitney U test, with P < 0.05 (*) and P < 0.01 (**) representing statistical significance. The error bars represent the standard error of the mean (n = 5). Poly(I:C) polyinosinic–polycytidylic acid
