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  1. Smoking’s effects on the immune system can last years, study finds

  2. Timeline after quitting smoking - Medical News Today

  3. What Happens to Your Body When You Quit Smoking? - WebMD

  4. WHO releases first-ever clinical treatment guideline for tobacco ...

  5. Smoking / Quit Smoking - Medical News Today

  6. New WHO guidelines to help millions quit tobacco | UN News

  7. Smoking Cessation News & Features - WebMD

  8. How to Quit Smoking | Smoking and Tobacco Use | CDC

  9. WebMD's Guide to Quit Smoking

  10. Four steps to help you quit smoking in 2025 | News