Keywords: AA, alopecia areata; DS, Down syndrome; Down syndrome; IFN, interferon; JAK, Janus kinase; Janus kinase inhibition; STAT, signal transducer activator of transcription; T21, trisomy 21; Xeljanz; alopecia areata; atopic dermatitis; autoimmunity; eczema; interferon; tofacitnib; trisomy 21; vitiligo.