There has been discussion here in the past about the unlikelihood of a linux machine getting a virus.
A newly discovered implementation of Turla targets linux. It does not need to be installed as root and so far there is no apparent fix. General information at the link below - follow up on the second link and in searches for linux turla. (Remove  from links.)
The virus seems to be targetted (mostly?) at govs and it's speculated a gov may have created it.
[edited by: engine at 4:57 pm (utc) on Dec 9, 2014]
[edit reason] Made links clickable [/edit]