9 months after quitting vapingWhat nobody has measured yet
What's happening in your body
On the cigarette timeline this entry lists lung changes with dates attached, drawn from half a century of research. Nothing like that exists for vaping. The devices have been in wide use for little more than a decade, the people who only ever vaped are mostly young, and no study has followed them for years after they stopped. The main evidence reviews all end on the same note, that long-term data are needed.
What to expect
No promises with a date on them, from this app or from anyone who is being straight with you. What is known is narrower and still worth having. Nothing is arriving. Nicotine, the drying aerosol, the metals from the coil and the flavour compounds all stopped nine months ago. And whatever the cause, a cough that has lasted more than three weeks, breathlessness that is getting worse, or any blood is worth showing to a doctor.
Try this
Look at the first throat note from day nine, the stairs from day twelve and the pulse readings, and add today's.
What else you could do
Nine months of measurements on one person who stopped is a small study, and it is about the person you care most about here. If a cough or breathlessness has not improved at all, ask a doctor about a simple breathing test called spirometry. It gives you a number to compare against later.
Sources. Lindson et al., Cochrane, 2025. Butler et al., Cochrane, 2025. Goniewicz et al., 2018. Long-term recovery: not measured.