MIS-A stands for "multi-system inflammatory syndrome in adults." When the condition was identified in children this spring, it was named MIS-C, with the C standing for "children." Kids were developing dangerous inflammation around the heart and other organs, often weeks after their initial infections with SARS-CoV-2, the virus that causes COVID-19. … But many doctors may not, in fact, be recognizing the condition in adults. Just a few dozen cases of MIS-A have been reported. And not all patients have obvious rashes.