It is possible, but highly unlikely. I didn't notice any odd files, or behavior that would be virus induced. As far as I know there are very few web browser exploits for non-IE browsers, and there's nothing to make me believe any non-IE browser actually fetched a virus from somewhere. I also used a mail program that didn't (as far as I know) activate anything in a mail file unless told to (text only iirc). I've only opened an attachment one or three times in my life. I also usually do research on a piece of software before downloading and installing.
I also should indicate that I don't regularly use a virus scanner (don't have one installed right now) but I have scanned a few times in the past (I had one installed back when I ran windows, though it was just sitting in disuse), and never found a virus (yeah, it wasn't frequent enough to be 100% sure).
Right now I'm sure I don't have a virus as I'm running linux (being rather careful about security), a virus scanner probably won't be needed.