FAQ
Does smoking weaken your immune system
Yes, smoking reduces immune function by 40% and increases infection risk.
Quick Answer
Yes, smoking reduces immune function by 40% and increases infection risk.
Detailed Explanation
White blood cell function decreases, healing slows, and illness frequency increases. Quitting restores immunity.
Key Facts
- Smokers get more colds, flu, and infections
- Immune function improves within 1-3 months of quitting
What the Research Says
WHO confirms smoking severely compromises immune response
Frequently Asked Questions
Will I get sick less after quitting
Yes, significantly fewer infections within months
How long to restore immunity
Major improvements within 1-3 months; full recovery within a year
Sources & References
The information in this article is based on publicly available research and guidance from the following authoritative health organizations:
- CDC - Smoking & Tobacco Use
- WHO - Tobacco
- NIH - National Cancer Institute
- American Lung Association
- American Heart Association
- Truth Initiative
- Smokefree.gov
Sources accessed February 2026
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