Did I say 'herpes and diabetes were contagious from touch-screens' (That's the inference backing your response.....)?!? I'm positive I said that the *aphorism* (would-be truism) you invoked, "That which doesn't...." was designed for the morale of sufferers of such non-life-threatening diseases or 'conditions' as herpes or diabetes (I made no distinction between intracellular parasites and environmental toxins, since it's 'symptoms' that elicit the comment; not 'causes'), but that it did NOT apply (as an aphoristic generality) to those of us who's 'debilitator' was something other than disease. CharlieSpencer_P got it, didn't he? He invoked a paraplegic.....