general question about ClamAV plugin

[cmacduff]

When using the ClamAV plugin i realize that this is not the entire
ClamAV application but how do I then keep the virus definitions for
the plugin up to date? do I need to actually install the ClamAV
application to use freshclam to update the virus definations and then
do i need to have the ClamAV plugin point to a different spot for it
to see these newer definations?