I actually concur with that statement.
If he was referring to computer viruses. Well, most computers come with a virus protector, if not it is not hard to download AVG free or buy one for about �20.
If he was referring to health viruses. Well, stay away from infected people, wash you hands, use anti-bacterial detergent and if having casual sex wear a French Letter.
It is hardly rocket science is it?
So yes, those who get viruses in whatever guise probably are thick as pig sh!te