If you click "download" or visit "https:// directly, you'll see a closed tab with the name "Virus Database." If you click that, you'll see: For Clam AV to work properly, both the Clam AV engine and the Clam AV Virus Database (CVD) must be kept up to date.
To get Clam AV on Cent OS installed, we have to use the EPEL repository (Extra Packages for Enterprise Linux).
Fortunately, the Fedora project provides this with an easy installation.
We didn’t get a systemd service file, so creating a quick file here.
The process should be forking itself and start freshclam in daemon mode.