Viruses are in competition with the host for the cellular translation machinery, prompting some viruses to inhibit host cell gene expression. Preventing the expression of host proteins is also a strategy to counteract the antiviral response 
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Some viruses encode proteins which prevent host gene expression by blocking host transcription, suppressing mRNAs or translation.
Virus-induced host gene shutoff in animals and plants.
Aranda M, Maule A.
Virology. 1998 Apr 10;243(2):261-7. Review. PubMed PMID: 9568025
Aranda M, Maule A.
Virology. 1998 Apr 10;243(2):261-7. Review. PubMed PMID: 9568025