I had symptoms for about a month, I was hacking stuff up and was really worried that vaping was hurting me in some way. It didn't hep that I got a killer cold the first week I was vaping (caused me to smoke two packs in two days, "Hey, I can't breathe through my nose, let me smoke this cigarette to further hinder my breathing ability. Good Stuff") Now I've been off the analogs almost two months and it is much better, of course, living in NWPA with the weather changes and all I'm getting a cold AGAIN.