You gotta keep in mind Diet affects the immune system on a large level as well. If you mix in a bad diet and heavy smoking I would say its possible. I am not an MD just an RN whoʻs in School for Bio Mechanical Engineering and Neurosciences.

But keep in mind that somewhere around 50% or regular Cannabis Smokers are also Cigarette Smokers as well and Cigarettes for fact lower the immune system.

But there are so many Variables involved itʻs hard to say certain.
FlyinPolynesian Reviewed by FlyinPolynesian on . Cannabis Weakens the Immune System Is this a myth? Has anyone experienced this? It's plausible to me that smoking it would, but eating, vaping, or drinking would not do that at all. It seems like more government propaganda bullshit. Rating: 5