STAT2 is a protein that plays a crucial role in the immune response and cellular signaling. It is part of the STAT family of proteins, which are involved in transmitting signals from various cytokines and growth factors. When activated, STAT2 helps regulate the expression of genes that are important for fighting infections and inflammation. In addition to its role in immunity, STAT2 is also involved in the response to viral infections. It works alongside other proteins, such as IFN (interferon), to enhance the body's defense mechanisms. This makes STAT2 an important target for research in understanding and treating various diseases, including viral infections and autoimmune disorders.