Well, every breath you exhale does, so odds are, yes.
but there might be an anti-microbial action to the nicotine or flavourings.
True - nicotine is anti-microbial, that's kinda why plants make it - but flavourings can probably go either way - although essential oils tend to be a pretty hostile place for any microbe.
Propylene Glycol - the base of many e-juices - is sometimes vaporized in hospitals to prevent airborne infections.