Most studies now are saying that vaping is every bit as bad for the lungs as smoking. If you think about it, that makes sense. The lungs are not designed to inhale ANYthing but clean air, and doing anything else is going to do damage. Most especially if the lungs are already compromised.
there's no need to vape, anyway. Tinctures are widely available (that's what I use) and work just as fast and just as well. Other edibles work great too, but need about an hour to go through the system and start working. sometimes I do some tincture, and follow up with a gummie, which starts to take effect when the tincture starts to lose it's effectiveness. You can experiment to see what works best for the person you are caring for. But try to talk her out of the vaping.