Figure 1 : PLS-DA analysis of patient samples with severe and moderate infection level for four consecutive days with the control group (S:severe, M: moderate, C:Control) a. Matching score plots for the first five components of the PLS-DA analysis of all samples. 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=0.817, (R2=0.246, Q2=0.142), component 2: accuracy=0.833, (R2=0.394, Q2=0.210), component 3: accuracy=0.809, (R2=0.545, Q2=0.225), component 4: accuracy=0.777, (R2=0.644, Q2=0.250), component 5: accuracy=0.769, (R2=0.782, Q2=0.205)