I understand that cold symptoms (fever, coughing, sneezing, etc.) are the body's attempt to kill or expel the infectious agents. Now, either vaping is killing the viruses that caused me to get colds, or vaping is suppressing my immune system and thus preventing my body from attacking the viruses. If it's the latter, then I suppose my body must be full of multiple viruses that don't seem to be harming me at present but at some point may produce devastating consequences.
Oh god, I hadn't thought of it that way. Ugh.