Coronavirus Disease 2019 (COVID-19), caused by the SARS-CoV-2 virus, emerged in late 2019 and has become a pandemic. Although SARS-CoV-2 primarily attacks host respiratory tracts, as suggested by its name, the virus can also cause inflammation-mediated multi-organ injury upon binding to angiotensin-converting enzyme 2 (ACE2) receptors in other host cell types. This condition is described as multi-system inflammatory syndrome in children (MIS-C) or adults (MIS-A).