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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.
HIV, the virus that causes acquired immune deficiency syndrome (AIDS), doesnât appear to cause cancers directly. But HIV infection increases a personâs risk of getting several types of cancer, especially some linked to other viruses.iruses that can lead to cancer. Viruses are very small organisms; most canât even be seen with an ordinary microscope. They are made up of a small number of genes in the form of DNA or RNA surrounded by a protein coating.