Over 100 Inflammatory Syndrome Cases Among Children In North India As Post-Covid Reaction Over 100 Inflammatory Syndrome Cases Among Children In North India As Post-Covid Reaction The sudden spurt in MIS-C cases has been observed typically in post-Covid patients mostly between 4 to 18 years. However, there are rare cases of MIS-C affecting babies six months old. Symptoms of MIS-C are fever for three to five days, severe abdominal pain among other things. New Delhi: More than 100 cases of multi-organ inflammatory syndrome in children (MIS-C) have been reported in northern India in the last five days as post-Covid reaction, Indian Academy of Pediatric Intensive Care said citing its data.