[CentOS] All screwed up

I've apparently made a mess of clamav.  Tried uninstalling it, and 
excluded it from dag's repo.  Now, when I yum install clamav and 
clamav-server, I'm apparently missing all the libs, data and so forth.  
Can someone tell me what I need to do to get this back ?  I probably 
blew all the old stuff away during the update or later, and don't have a 
clue as to why it's not doing what it's supposed to now.

TIA

-- 
Sam W.Drinkard -- sam at wa4phy.net
NOAA Cooperative Observer
http://wa4phy.net
Augusta Area Mesonet