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What happens 30 days after you quit smoking?
Thirty days without cigarettes: one month. Circulation and lung function can start to improve, and your lungs' clean-up crew, tiny hairs called cilia, can get back to work.
So you might cough more at first: that's often them clearing the mess. Withdrawal is usually fading by now, but cravings can still show up. Part 4 of the quit series (Day 1, Day 3, Day 7, Day 30). Next: why is the sky blue?
About this film
A 29-second widescreen (16:9) explainer film, made in the Risograph print style, published on 23 October 2026.
One month without cigarettes in four quick beats and a verdict: a cough can be your lungs cleaning house.
The style: Risograph print. True spot-ink print: halftone dots, misregistration, drawn in code.
Scene by scene
- 0:00Day 30: a torn-off calendar page with a circled 30 over the snapped cigarette
- 0:03Heart vessels brighten and the lungs fill with blue
- 0:06The clean-up crew: broom-hairs stand up and sweep the airway
- 0:10The brooms sweep a mucus blob up and out as a cough puff
- 0:15The withdrawal wave flattens; one craving spike still pops
- 0:19Verdict: lungs cleaning house
- 0:23End card: next film, why the sky is blue
Transcript
Thirty days without cigarettes: one month. Circulation and lung function can start to improve. And your lungs' clean-up crew, tiny hairs called cilia, can get back to work. So you might cough more at first. That's often them clearing the mess. Withdrawal is usually fading by now, but cravings can still show up. The verdict: a cough can be your lungs cleaning house.
Next: why is the sky blue? Follow for more explainers, or make your own at explain.film.
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