Cigarette Smoke Jolts Hundreds of Genes, Researchers Say

E-cigs are considered safe alternatives to smoking cigarettes since they don’t contain those harmful components available in real cigarettes.
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Well I've been both a smoker and non smoker at different periods of my life and I can honestly say that when I'm not smoking I get as sick as a dog with every flu, cold and virus going around.
When I smoke I never have a sick day.
If certain genes are hyper expressed, then it's obviously ones that are protective to certain viruses.
I don't need a scientist to tell me this because I've seen it and experienced it. But I would like a scientist to explain why I'm protected from certain ailments while I"m a smoker as to opposed to when I'm not.