coronavirus disease 2019 (COVID-19). As of 25 May 2020, the outbreak of COVID-19 has
caused 347,192 deaths around the world. The current evidence showed that severely ill
patients tend to have a high concentration of pro-inflammatory cytokines, such as interleukin
(IL)-6, compared to those who are moderately ill. The high level of cytokines also indicates a
poor prognosis in COVID-19. Besides, excessive infiltration of pro-inflammatory cells, mainly …