Antivirus for Ubuntu

When I installed my Ubuntu 18.04 it came with ClamAV as part of the bundle.
Now I see that Sophos is touting their own AV as the best; and the website for ClamAV features it mostly as an email protector.
So… Which of the two is truly better for both email and general file protection?
As usual, thank you very much
Tom Markham

This a a good article on how to use ClamAV for in general: https://linuxconfig.org/scan-ubuntu-18-04-for-viruses-with-clamav

Thank you. That helps a lot.