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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.
Some viruses, such as Epstein-Barr virus, often cause cells to proliferate without causing malignancy; but some other viruses, such as papillomavirus, are an established cause of cancer. When a cell's DNA is damaged by a virus, and if the cell cannot repair itself, this often triggers apoptosis.lant viruses are often spread from plant to plant by insects and other organisms, known as vectors. Some viruses of animals, including humans, are spread by exposure to infected bodily fluids. Viruses such as influenza are spread through the air by droplets of moisture when people cough or sneeze.