Figure 2 : PLS-DA analysis of patient samples with severe and moderate infection level for first two days with the control group Matching score plots for the first five components of the PLS-DA analysis of samples from day 1 and day 2 as labeled mild (M), severe (S) and compared with the control group (C). b, partial Least Squares Discriminant Analysis score plot. c, Variable importance score plot in PLS-DA VIP Projection. d, corresponding compounds in detected increases on the spectra. Component 1: accuracy=0.0837, (R2=0.585, Q2=0.417), component 2: accuracy=0.821, (R2=0.627, Q2=0.433), component 3: accuracy=0.793, (R2=0.804, Q2=0.352)