Fig. 4From: Anti-H7N9 avian influenza A virus activity of interferon in pseudostratified human airway epithelium cell culturesCytopathic effect of rhIFN on 3D HAE cells. After being incubated for 24 h with rhIFN-λ1 or rhIFN-α2b, the 3D HAE cells were infected with 100 TCID50 of H7N9 for 24 h. The cells were then fixed and stained with HE, and images were taken with a microscope at a magnification of 40×Back to article page