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View full size image. Viruses may be causing more cancers than previously thought, according to a new study. Scientists know that a few cancers, such as cervical cancer, are caused by viruses, because researchers have isolated the viral genomes from the cancerous cells. But some viruses may take a hit and run approach â inducing cancer and then vanishing before the disease is caught, the researchers say.
Our growing knowledge of the role of viruses as a cause of cancer has led to the development of vaccines to help prevent certain human cancers. But these vaccines can only protect against infections if they are given before the person is exposed to the cancer-promoting virus.gain, although HPVs have been linked to these cancers, most people infected with HPV never develop these cancers. Smoking, which is also linked with these cancers, may work with HPV to increase cancer risk. Other genital infections may also increase the risk that HPV will cause cancer.