Interferon-inducing transmembrane proteins(IFITM)are a class of host-restricting factors(HRF)that play an important role in antiviral activity.IFITM are widely distributed and highly conserved in vivo.As the research advances,IFITM have been identified to redtrict many virus by various pathaways or mechanisms,which make developing IFITM to potential antiviral medicines or vaccine targets possible.This paper describes the topology,ant...