As far as I know, something along these lines already exists in Canada. Not the "vaccinating computers" part, but I had a few friends in college who had their i

As far as I know, something along these lines already exists in Canada. Not the "vaccinating computers" part, but I had a few friends in college who had their internet cut off until I ran a virus scan on their computer. It was a pain in the ass, but I'm sure the ISPs appreciated being able to cut off infected PCs from their networks.