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Immune System Recovery: How Quitting Smoking Restores Your Body's Defenses
Smoking suppresses the immune system—reducing its ability to fight infection and increasing inflammation. After quitting, immune function begins to recover within weeks. The immune system is among the first body systems to respond to cessation.
Smokers have higher rates of respiratory infections, slower wound healing, and elevated inflammatory markers. Within weeks of quitting, immune function begins to improve—white blood cell counts normalize, inflammatory cytokines decrease, and the body's ability to fight infection recovers. **The immune system is among the most responsive body systems to smoking cessation. The benefits begin almost immediately and accumulate over months.**
