I run a Red Hat derivative (CentOS) on one of the shop boxes (multiple users) and it has never picked up anything beyond a browser hijacking. So due diligence required action and now I run ClamAV, more to watch email as anything else.
Beyond that another point to consider, Linux user boards tend to focus on the releases they represent. Cross posting questions to unrelated boards may get you questionable results from time to time or you may end up waiting a long time to get any kind of answerer at all. However, I wish you luck with you AV search and your Red Hat experience. Enjoy
If you don't like it, make something better
If you can't make something better, adapt
If you can't do either ball your panties up and cry
Amazing how many advanced Window users show up on Linux boards.