Cohort Studyhigh evidence
Electronic cigarette use after smoking cessation and lung cancer risk.
Nature medicine·June 8, 2026·PMID 42260103
Why it mattersMany smokers switch to e-cigarettes believing they reduce harm, but this study suggests that using e-cigarettes after quitting conventional cigarettes may undermine the cancer-preventive benefits of complete cessation. Clinicians need evidence to counsel patients on the risks of dual or continued nicotine product use.

The papers that matter, first.
MedLit ranks the medical literature into a specialty feed with concise summaries, evidence-aware triage, and visual takeaways.
§
MedLit · Evidence, Distilled