Box plot showing the correlation of viral genes and different neutrophil subtypes. Data are represented as mean SEM ( n = 9 slides per timepoint). Center line, median; box bounds, first and third quartiles; whiskers, 1.5 times the interquartile range. Statistical analysis between two groups was performed by two-sided Students t -test. Statistical analysis within each slide was performed by Pearson correlation, where black dots represented P < 0.05, and gray dots represented P > 0.05.