Hm, I'd have expected a better response under the 'xkcd' moniker, something more... logical. Something like...

             Say, I think I'll
    O  o --- take my chances
   /|\/|\    with this cough
   /\  /\
   ---------------------
             But why would you risk
    O  o --- being infected? You'll
   /|\/|\    feel miserable!
    /\ /\
   ---------------------
             I'd rather feel miserable
    O  o --- only once instead of
   /|\/|\    three-four times.
   /\  /\