it depents on the options you pass to clamav. It can delete, rename, ignore, desinfect the file.
see man clamav
it generate a report.
if you want to get a mail from clamav run the script as a cronjob (customize the emailaddress, what to scan, what to exclude etc):
#!/bin/bash
cat /dev/null > /root/clamavscan.log
/usr/bin/clamscan -i -r --log /root/clamavscan.log --exclude=samba /home > /dev/null 2>&1
cat /root/clamavscan.log | mail -s "ClamAV scan /home without Samba: `date`" root
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