obsolete suppression by virus of host JAK1 activity via JAK1 binding (obsolete GO:0039578)
OBSOLETE. Any process in which a virus stops, prevents, or reduces the frequency, rate or extent of host JAK1 (Janus Kinase 1) activity by interacting directly and selectively with JAK1. For example, the polyoma virus T antigen binds to JAK1 and renders it inactive.