I have a bad cold and it has set me thinking.
Catching a cold is like catching a butterfly. If you catch it, you've got it imprisoned and its yours for the time until it dies. However, to know whether it's really yours, you should learn to let it go (with the help of Coldarin). If it comes back to you (as soon as you think that you've had enough of those tablets) it's yours. But if it does not come back, you were only dreaming about it on a light-headed midsummer night.