Comparison of differentially expressed miRNAs in w81-infected and ma81-infected mouse lungs at 1 dpi and 3 dpi. Venn diagram and heat maps indicate expressed miRNAs during w81 and ma81 infections relative to the mock infection (control) on 1 and 3 dpi. Red and green colors represent up- and down-regulation, respectively. Fold change ≥2 or≤−2, P value ≤0.05. A: 1dpi, B: 3dpi.