Virus replication can persist in such patients for prolonged periods of time despite antiviral treatment, creating an environment in which drug-resistant viruses can readily be selected.

病毒复制可延长这类患者的患病时间，尽管他们在接受抗病毒治疗，从而产生一种耐药性病毒很容易适应的环境。

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It is an important biological target in the drug screening and drug designing. Lots of anticancer drugs and antiviral drugs had effects on DNA.

对DNA的研究是生命科学研究中一个极其重要的方面，在药物筛选和药物设计中它是重要的作用靶点。

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But that number can be reduced drastically to around 20% by giving infected pregnant women a short course of an antiviral drug just before they give birth.

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Its main product will be an antiviral drug called ribavirin, which is being marketed by Schering-Plough (nyse: SGP - news - people) as part of a combination therapy for hepatitis C.

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In separate experiments, the two flavonoids were added to lung-cell cultures before, during and after infection with H5N1, and tested on H5N1-infected cells treated with zanamivir (brand name Relenza), an antiviral drug prescribed to flu patients.

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