I have trouble accepting the argument that the classical plural of "virus" can't be "virora" simply because it "does not fit comfortably in the mouth of an English speaker". While it's questionable whether the Romans ever spoke of "several slimes", if they had chosen to do so I don't think their choice of plurals would have been influenced by the peculiarities of people who would not be born for another 2000 years.
Blah blah blah. It's 'viruses', unless you're being pretentious. Next?
But some of us like being pretentious! :-)
Being that there's more than one of you, shouldn't that be pretentii? :)