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Clinical characters of healthy volunteers. (a) Vital sign parameters before and after haMSC‐EVs nebulization in MEXVT. (b) Level of IgE before and after haMSC‐EVs nebulization in MEXVT. haMSC‐EVs: human adipose‐derived MSC‐Extracellular vesicles; IgE: ImmunoglobulinE
