Hi, To answer your questions ( I didn't see your name); 1. I've never smoked tobacco. Only marijuana in my 20's. I'm now 65. I was diagnosed w/ MAC May 2016. 2 .I've never worked in the medical profession. 3. I've never had the whooping cough. 3. I was raised in the Boston, Mass. area but have lived in Northern CA. longer in the bay area. Good luck with your research. Thanks. Rona