OK- so this is for my sister- she has recently started vaping. She has had a couple people tell her that heavy vaping can cause pneumonia- and they are VERY adamant about it- probably the kind you just don't argue with... Anyways- has anybody ever heard of this or have it happen to themselves or someone they know? I think it is BS myself, but to ease her mind (since she hasn't asked this question on here yet) I thought I would do it. It would be great for her to have some info to debate the subject when she runs into these people again or others in the future. I did search pneumonia in the search feature but didn't come up with any threads (or maybe I'm just to lazy to read through all the threads that might mention this word). So anyways- some opinions would be great or any links to the subject of vaping and pneumonia. Going to Google it too 