Multisystem Inflammatory Syndrome (MIS-C) has been a mysterious and frightening consequence of COVID-19 in children. A new study is shedding light on the potential longer term impacts of the syndrome.

Emergency room physicians at Michigan Medicine sound the alarm over increasing COVID cases.

The condition causes vital organs and tissues to become severely inflamed.

They called it Multisystem Inflammatory Syndrome in Children (MIS-C). They’re calling it Multisystem Inflammatory Syndrome in Adults. About a third of the patients tested negative for COVID-19, but tested positive for antibodies -- indicating they had been infected in the past. All but one of the MIS-A patients described in the report belonged to a racial or ethnic minority group. The CDC said 10 adult patients in the report required intensive care, three were intubated and three died.