Now this concept was shattered, and the question of viruses as a cause of human cancer assumed new significance.

现在这个概念被打破了，病毒作为人类癌症的原因的问题推测有了新的意义。

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But the viruses can cause mutations scientists don't want, and in some cases, they cause cancer.

但是病毒会导致科学家们不愿意看到的变异，在某些情形中，它们甚至会引发癌症。

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It has been known for decades that viruses cause some types of cancer but it was thought to be only 10 to 20 percent of cases.

几十年来，病毒会引发某些类型的癌症已众所周知，但这种案例被认为仅占10% - 20%。

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and also intensify vaccination against all infectious agents, all viruses that are known to be strongly associated with the development of cancer. The government should increase its efforts to prevent illnesses with links to cancer, he says,such as hepatitis, a disease of the liver, and the human papillomavirus, which is transmitted during intercourse and is linked to cervical cancer.

VOA: standard.2010.06.16

They took these "dendritic" cells and added proteins from various types of cancer, or viruses, using a bird virus to transport the proteins into the dendritic cells.

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She has a partner and together they see hundreds of patients a week, helping to diagnose and treat everything from viruses to cancer.

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More recently, it rebuffed routine prostate-cancer screening and the use of tests that detect the viruses that can cause cervical cancer.

WSJ: Scott Gottlieb: Meet the ObamaCare Mandate Committee