Fig. 5

Infiltration of inflammatory cells during wound healing. The hAAM-Exos group showed the lowest number of inflammatory cells at days 5 and 14 and the highest proportion of anti-inflammatory cells (CD206+) at day 5. a, b Representative images and quantification results of inflammatory cells evaluated by H&E staining in all groups at days 5 and 14. The 200× image scale bar = 50 μm; the 400× image scale bar = 20 μm. c Representative images and quantification results of CD206+ cells by immunohistochemical staining at day 5. Scale bar = 20 μm; **P < 0.01, *P < 0.05