Spring/summer colds. This one's a chest cold. I suspect I caught it at a doctor's office since we've been to several lately, and that's where people take the persistent ones. This one starts as a chest cold, mostly stays there. It was slow, so when it finally became productive (sorry but that' where you spit mucus) I thought it was over. I drink lots of liquids, nap, do cough syrup. If something like this shows up, over-treat it. It lets you go about your business to a degree, but then it doesn't go away. Not bidding for sympathy, just want to give others a chance to knock it down sooner.