[clamav-users] No supported database files found

[farbod emami]

Dear sir, hi
I encountered this error when running the " sudo clamscan -r " command
LibClamAV Error: cli_loaddbdir(): No supported database files found in /usr/local/share/clamav
ERROR: Can't open file or directory

----------- SCAN SUMMARY -----------
Known viruses: 0
Engine version: 0.99.1
Scanned directories: 0
Scanned files: 0
Infected files: 0
Data scanned: 0.00 MB
Data read: 0.00 MB (ratio 0.00:1)
Time: 0.002 sec (0 m 0 s)

please help