I have a bit of a chest cold and it seems to me that the hygroscopic properties of PG in ejuice would cause respiratory secretions to thicken and become more viscous possibly prolonging ones cold or worse, putting one at higher risk of developing pneumonia. I drink plenty of water, but I wonder how strong the local effect of PG in the lungs is? I know the simplest and best answer is 'don't vape when you're sick', of course. I just wonder if anyone has any more input on this.