Previous studies have reported that phototherapy using red light and near‐infrared light can reduce pulmonary inflammation and lung fibrosis in mice by downregulating pro‐inflammatory cytokines, upregulating the secretion of IL‐10 from fibroblasts and pneumocytes, and reducing collagen deposits in the lungs.[96, 97, 98] Since pulmonary inflammation and lung fibrosis are commonly observed complications in critical patients with SARS‐CoV‐2 infection, the 650‐nm LED treatment in our study could potentially relieve these life‐threatening complications. This evidence concerns the gene IL10 and pulmonary fibrosis.