ERVW-1 and breast cancer: Other HERVs have been correlated with a variety of diseases: HERV-K, HERV-E, and HERV-W are associated with cancers such as ovarian cancer and breast cancer [155–158], HERV-W and HERV-K are associated with autoimmune diseases [155, 159], and HERV-W is associated with schizophrenia [160, 161].