"Many people in the open source community question the need for
antivirus software on a Linux or BSD system--especially a
non-corporate, home system. But let me ask you, 'Do you send and
receive emails?' 'Do you download files from untrusted sources?'
'Does your web browser and/or news reader download info from the
web and cache it on your system?' If the answer to any of these is,
'Yes,' you may want to reconsider your position on antivirus
software and open source systems. While it's true that very few of
the viruses and other malware out there can do much damage to a
Linux or BSD system, they are still not something you want laying
around on your system in an email or wherever. And you certainly
don't want to run the risk of passing them on to your windows-using
friends and family..."