Fig. 2From: Bioinformatics analysis identifies a key gene HLA_DPA1 in severe influenza-associated immune infiltrationPrincipal component analysis of gene expression data set. The dots in the scatter plot are based on the first two main components of the gene expression profile (PC1 and PC2) visualization samples: a no elimination of batch effect; b elimination of batch effect. The colors represent samples from two different data setsBack to article page