Please enable clamd notification by default in /etc/freshclam.conf by: NotifyClamd /etc/clamd.conf This is worthless do run freshclam on daily basis without pinging to daemon.
It's not completely worthless, as clamd will do notice that the db-files has changed automatically every $SelfCheck seconds. From "man freshclam.conf": NotifyClamd STRING Notify a running clamd(8) to reload its database after a down- load has occurred. The path for clamd.conf file must be pro- vided. Default: The default is to not notify clamd. See clamd.conf(5)´s option SelfCheck for how clamd(8) handles database updates in this case.