MIS-C usually affects school-age children, most commonly 8- and 9-year-olds, but the syndrome also has been seen in infants and young adults. MIS-C symptoms appear between two and six weeks (four weeks on average) after COVID-19 infection.

What is multisystem inflammatory syndrome in children in the context of COVID-19?

Multisystem inflammatory syndrome (MIS) is a rare but serious condition associated with COVID-19 in which different body parts become inflamed, including the heart, lungs, kidneys, brain, skin, eyes, or gastrointestinal organs. MIS can affect children (MIS-C) and adults (MIS-A).

Is multisystem inflammatory syndrome (MIS) after COVID-19 rare?

While it is very rare, some people, mostly children, experience multisystem inflammatory syndrome (MIS) during or immediately after a COVID-19 infection. MIS is a condition where different body parts can become inflamed.