(A and B) The frequencies of each immune cell type among the parental cell lineage. From top to bottom, B cell, CD4 T cell, CD8 T cell, dendritic cell (DC), and monocyte (Mono) data are presented. The mean cell frequencies in healthy controls (HCs) and patients with inactive or active idiopathic inflammatory myopathy (IIM) are shown in (A). The mean cell frequencies in myositis‐specific antibody (MSA)‐positive patients with IIM according to active and inactive disease status are shown in (B). ARS, aminoacyl‐transfer RNA synthetase; CL, classical; CM, central memory; DN B, double negative B; EM, effector memory; Fr. II eTreg, fraction II effector regulatory T; Int, intermediate; MDA5, melanoma differentiation‐associated gene 5; mDC, myeloid DC; NC, non‐classical; pDC, plasmacytoid DC; SM B, switched memory B; TEMRA, terminally differentiated effector memory; Tfh, follicular helper T; Th1, T helpler 1; USM B, unswitched memory B.