The article is correct: no system can be 100% secure, and adding an anti-virus layer helps. But the article specifically discusses desktop Linux and Ubuntu Lin

The article is correct: no system can be 100% secure, and adding an anti-virus layer helps. But the article specifically discusses desktop Linux and Ubuntu Linux in particular. If we were to discuss Fedora Linux with SELinux enabled (+enforcing) I'd argue that the anti-virus part is unnecessary.