Semen does carry the virus, I was tested twice and both times came out negative, I was really scared, but, you have to be careful not to use, their tooth brush, their fingernail clippers, toenail clippers, their shavers anything like that, that may have any residue of blood in it at all. His was really bad. Any open wounds that they have, having sex while you are on your period....Its not something to mess with at all, you should be checked just to be on the save side