Sure, but my virus scanner only complained about the
one or two instances
of Stoned (which I let it "fix"). As far as I know, there was never a
known instance of a virus on an 8 bit machine.
There are 1 for MSX...
http://www.msx.org/forum/msx-talk/software-and-gaming/msx-virus
It is a **very** common virus in MSX computers