IFITM2 (Interferon Induced Transmembrane Protein 2): IFITM2 is a member of the interferon-induced transmembrane protein family that plays a key role in the body’s defense against viral infections. It helps inhibit the replication and spread of various enveloped viruses by blocking the fusion of viral and host cell membranes—a crucial step in the viral life cycle. IFITM2 expression is increased in response to interferon, emphasizing its importance in the innate immune response to viral threats.