While cases of COVID-19 and the flu are finally trending down, another illness appears to be rising fast. It’s called Multisystem Inflammatory Syndrome in Children (MISC). It's related to COVID. Symptoms include high fevers and severe inflammation in the body, including the heart, lungs, skin and brain. On Thursday, the LA County Department of Health reported 10 new cases of MISC, making a total of 100 cases in the county. So far, one child has died.