Those cells then start dividing uncontrollably, said CBS 2 News. So if breast cancer is caused by a virus, it might one day be preventable with a vaccine, the television station reported. Similar vaccines for other cancers are already being developed. Researchers at Kast's Loyola laboratory are working on a vaccine for cervical cancer, a tumor proven to be caused by a virus. If the same proof is found for breast cancer, a simple shot might one day prevent that disease.
Doctors believe the cancer is passed down genetically from parents to children.
There are other contributing factors for breast cancer, but the virus could be the most important. Voted best news site in California and Nevada by the Associated Press Television and Radio Association.