I think technically a virus infects other files, but a worm is it's own file(s) that spread one way or another. A Trojan is just one means of spreading, and ca

I think technically a virus infects other files, but a worm is it's own file(s) that spread one way or another. A Trojan is just one means of spreading, and can be used by viruses, worms, or other malware. Though there really is no point in be pedantic about the definitions because all the lines have been blurred for decades.