Breast Cancer Risk Linked to Virus Found in Cattle

In the study, researchers tested the breast tissue of about 240 women for BLV, and found that 59 percent of the samples from women who had breast cancer showed signs of BLV. Only 29 percent of the samples from women without breast cancer showed signs of the virus. The researchers' analysis of the data revealed that the odds of having breast cancer, when taking other risk factors into account, were three times higher if BLV was present — an increase that's higher than those of several other