No wonder the industry has been taken aback by the speed at which this virus propagated itself. To get your machine infected (which has little effect on it, but makes it a vehicle for onward propagation) you have first to be foolish enough to open unsolicited mail from unknown sources, and second foolish enough to open any attachments that come with such mail.

Those like Bill D (and me) who don't use non-Microsoft mail clients should not be troubled at all by this particular meance, nor by many others.