obsolete suppression by virus of host JAK1 activity by negative regulation of JAK1 phosphorylation (obsolete GO:0039577)
OBSOLETE. Any process in which a virus stops, prevents, or reduces the frequency, rate or extent of host JAK1 (Janus Kinase 1) activity by stopping, preventing or reducing tyrosine phosphorylation of JAK1 and thereby activation of JAK1.