. "Any process in which a virus stops, prevents, or reduces the frequency, rate or extent of host STAT1 (signal transducer and activator of transcription-1) activity. STATs are SH2 domain-containing proteins which lie downstream of many signaling receptors. Upon phosphorylation by JAKs, STAT proteins hetero- or homo-dimerize and translocate to the nucleus to activate transcription of target genes." . . "Inhibition of host STAT1 by virus" . "suppression by virus of host STAT1 activity" . "inhibition by virus of host STAT1 activity" . . . . . . .