Preferedly not, unless you've tested it meticulously. Viruses can't be aimed, and once they hit you back they start doing unexpected stuff to you. Viruses tend to be used very rarely out side combat (where they ususally degenerate themselves along) or evosims (I remember somebody, perhaps EricL, got a sim going where bots would shoot a virus containing all their DNA after reproduction as a safeguard against mutations.)
Btw. I just found out I may be called into Wehrplicht in germany, despite living on the other side of the world (quite literally) . Another mess for me to sort out...