Struggling with virus issues!

[AmigaMance]

 Aah.. The dreadful saddam virus... I remember that many, many years ago, when i was using an Amiga 500, it managed to infect some of my disks too. just for your information, Amigas with KickStart 2 or greater are immune to this and to some other viruses.

[AmigaMance]

Would using Kickstart >= 2.x inhibit the activity of the virus even on an already infected disk?

 Yes.

Is this immunity intentional, or is it just the by-product of other changes?

 A "by-product". The carrier of the virus, disk-validator, was moved to the ROM.