Based on the expression of Gal-1 in vCTB and STB and its previously reported impact on infection by Human Immunodeficiency Virus type-1 (HIV-1) and Human T-cell Leukemia Virus type-1 (HTLV-1) [69,70,71], we previously investigated the potential modulation of hERV Env-mediated trophoblast fusion [72]. Here, LGALS1 is linked to infection.