STAT1 and AIDS: HIV/AIDS; Contaminated heart-lung machine in cardiac surgery; Immunological deficiencies in the Th1 pathway: Interferon gamma receptor; Interleukin-12 receptor; Signal transducer and activator of transcription 1 (STAT1); Interferon regulatory factor 8; GATA2 (MonoMAC syndrome); Interferon-stimulated gene 15; Nuclear factor-kappa-B essential modulator (NEMO); X-linked chronic granulomatous disease