Figure 1From: Proteomics analysis of differentially expressed proteins in chicken trachea and kidney after infection with the highly virulent and attenuated coronavirus infectious bronchitis virus in vivo The viral load in each sample was quantified using real-time RT-PCR. The average viral copy number (VCN) per g tissue of each group was calculated. Error bars indicate standard error of the mean, and dpi represent days post-inoculation.Back to article page