Fig. 5

Principal component plot of the three datasets included in group 2 (immunological tissues). The axes show the first two principal components with the amount of variance these components explain from the original data. Studies are represented by different colors, WNV-infected samples are displayed as triangles, mock-infected samples as squares. Although there is a strong variance between the studies on the first principal component, there is also a separation of infected and control samples on the second principal component