John Williamson wrote:

You'll know Linux is getting popular on the desktop when they start
advertising anti-virus programs for it,as that will mean it's common
enough for the black hats to be interested.

Wrong, GNU?Linux is NOT Windows. Neither in design or philosophy. GNU/Linux
was built from the ground up using proper coding practices & constant
development with many eyes examining the code.

there is Antivirus applications for Linux, but it's sole purpose is to
protect Windows PC's on the same network, or on Linux Mail servers to scan
for Windows malware.