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The finding challenges the belief that relapse risk fades uniformly as quitting gets easier, raising questions about how we support people trying to break free from cigarettes

Decoding them improves inventory control and keeps operations running smoothly

If a person experiences sudden chest pain that spreads to their arms, back, neck, or jaw, they need immediate medical assistance, as they could be having a heart attack.

This insight could inform future public health interventions aiming to reduce tobacco exposure in domestic environments

Acknowledgements This research was supported in part by a Developmental Research Program Grant from the Yale Head and Neck SPORE, P50 DE030707 Footnotes Conflict of interest The authors declare no competing interests

When nicotine enters the body, it is processed by the liver, which metabolizes the nicotine into cotinine metabolites