I never played Virus either, but I totally remember seeing the ads for it way back when and thinking it looked really cool, of course, that's the whole point of ads, so I really have no idea how the actual game is.
Sorry for taking so long in getting a new picture up! Here's the next one, I remember playing it way back when and enjoying it well enough. Just reinstalled it (and Dosbox) and it's enjoyable enough, quite easy, but fun for a 5 or 10 minute diversion. Also, sorry for the very bottom being cut off, my Dosbox window resized too large, apparently.
I swear i've played this game...I know it isnt Knight Games...but I'm drawing a blank on what it actually IS...