linux viruses are so rare that there are no insidances in the wild at the moment AFFAIK.
you can still inadvertantly transmit windows viruses without getting infected,
a very decent client for getting rid of thease is AVG (
www.avgfree.com)
there are 3 RPM files avalable to download, all with only 1 letter diffenrt in the name,
the leter that changes is imporant though,
m for mandrake/mandrivia
r for redhat/fedora
s for suse